1425521 has 2 divisors, whose sum is σ = 1425522. Its totient is φ = 1425520.

The previous prime is 1425511. The next prime is 1425527. The reversal of 1425521 is 1255241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 846400 + 579121 = 920^2 + 761^2 .

It is a cyclic number.

It is not a de Polignac number, because 1425521 - 2¹⁰ = 1424497 is a prime.

It is a super-2 number, since 2×1425521² = 4064220242882, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1425493 and 1425502.

It is not a weakly prime, because it can be changed into another prime (1425527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 712760 + 712761.

It is an arithmetic number, because the mean of its divisors is an integer number (712761).

2^1425521 is an apocalyptic number.

It is an amenable number.

1425521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1425521 is an equidigital number, since it uses as much as digits as its factorization.

1425521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 400, while the sum is 20.

The square root of 1425521 is about 1193.9518415749. The cubic root of 1425521 is about 112.5445683496.

The spelling of 1425521 in words is "one million, four hundred twenty-five thousand, five hundred twenty-one".