125645897 has 4 divisors (see below), whose sum is σ = 135310980. Its totient is φ = 115980816.

The previous prime is 125645873. The next prime is 125645903. The reversal of 125645897 is 798546521.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 21381376 + 104264521 = 4624^2 + 10211^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125645897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125645857) 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, 4832522 + ... + 4832547.

It is an arithmetic number, because the mean of its divisors is an integer number (33827745).

Almost surely, 2^125645897 is an apocalyptic number.

It is an amenable number.

125645897 is a deficient number, since it is larger than the sum of its proper divisors (9665083).

125645897 is an equidigital number, since it uses as much as digits as its factorization.

125645897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9665082.

The product of its digits is 604800, while the sum is 47.

The square root of 125645897 is about 11209.1880615859. The cubic root of 125645897 is about 500.8597169264.

The spelling of 125645897 in words is "one hundred twenty-five million, six hundred forty-five thousand, eight hundred ninety-seven".