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125023421 = 969712893
BaseRepresentation
bin1110111001110…
…11010010111101
322201020211220002
413130323102331
5224001222141
620223404045
73045452525
oct734732275
9281224802
10125023421
1164632a46
1235a53625
131cb95573
1412866685
15ae98e9b
hex773b4bd

125023421 has 4 divisors (see below), whose sum is σ = 125046012. Its totient is φ = 125000832.

The previous prime is 125023417. The next prime is 125023441. The reversal of 125023421 is 124320521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124320521 = 139563117.

It can be written as a sum of positive squares in 2 ways, for example, as 42758521 + 82264900 = 6539^2 + 9070^2 .

It is a cyclic number.

It is not a de Polignac number, because 125023421 - 22 = 125023417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125023393 and 125023402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125023441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3251 + ... + 16143.

It is an arithmetic number, because the mean of its divisors is an integer number (31261503).

Almost surely, 2125023421 is an apocalyptic number.

It is an amenable number.

125023421 is a deficient number, since it is larger than the sum of its proper divisors (22591).

125023421 is an equidigital number, since it uses as much as digits as its factorization.

125023421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22590.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 125023421 is about 11181.3872574024. The cubic root of 125023421 is about 500.0312260498.

Adding to 125023421 its reverse (124320521), we get a palindrome (249343942).

The spelling of 125023421 in words is "one hundred twenty-five million, twenty-three thousand, four hundred twenty-one".

Divisors: 1 9697 12893 125023421