125023919 has 4 divisors (see below), whose sum is σ = 127931496. Its totient is φ = 122116344.

The previous prime is 125023897. The next prime is 125024059. The reversal of 125023919 is 919320521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125023919 is a prime.

It is a super-2 number, since 2×125023919² = 31261960644237122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125023519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1453724 + ... + 1453809.

It is an arithmetic number, because the mean of its divisors is an integer number (31982874).

Almost surely, 2^125023919 is an apocalyptic number.

125023919 is a deficient number, since it is larger than the sum of its proper divisors (2907577).

125023919 is an equidigital number, since it uses as much as digits as its factorization.

125023919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2907576.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 125023919 is about 11181.4095265311. The cubic root of 125023919 is about 500.0318899660.

The spelling of 125023919 in words is "one hundred twenty-five million, twenty-three thousand, nine hundred nineteen".