125157818 has 4 divisors (see below), whose sum is σ = 187736730. Its totient is φ = 62578908.

The previous prime is 125157803. The next prime is 125157841. The reversal of 125157818 is 818751521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 818751521 = 7 ⋅116964503.

It can be written as a sum of positive squares in only one way, i.e., 118309129 + 6848689 = 10877^2 + 2617^2 .

It is a super-2 number, since 2×125157818² = 31328958813042248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31289453 + ... + 31289456.

Almost surely, 2^125157818 is an apocalyptic number.

125157818 is a deficient number, since it is larger than the sum of its proper divisors (62578912).

125157818 is an equidigital number, since it uses as much as digits as its factorization.

125157818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62578911.

The product of its digits is 22400, while the sum is 38.

The square root of 125157818 is about 11187.3954967186. The cubic root of 125157818 is about 500.2103355055.

The spelling of 125157818 in words is "one hundred twenty-five million, one hundred fifty-seven thousand, eight hundred eighteen".