125157817 has 4 divisors (see below), whose sum is σ = 125180496. Its totient is φ = 125135140.

The previous prime is 125157803. The next prime is 125157841. The reversal of 125157817 is 718751521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 125157817 - 2¹⁹ = 124633529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125157217) 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, 2898 + ... + 16084.

It is an arithmetic number, because the mean of its divisors is an integer number (31295124).

Almost surely, 2^125157817 is an apocalyptic number.

It is an amenable number.

125157817 is a deficient number, since it is larger than the sum of its proper divisors (22679).

125157817 is an equidigital number, since it uses as much as digits as its factorization.

125157817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22678.

The product of its digits is 19600, while the sum is 37.

The square root of 125157817 is about 11187.3954520255. The cubic root of 125157817 is about 500.2103341733.

The spelling of 125157817 in words is "one hundred twenty-five million, one hundred fifty-seven thousand, eight hundred seventeen".