125978618 has 8 divisors (see below), whose sum is σ = 189671220. Its totient is φ = 62754880.

The previous prime is 125978617. The next prime is 125978641. The reversal of 125978618 is 816879521.

It can be written as a sum of positive squares in 2 ways, for example, as 111788329 + 14190289 = 10573^2 + 3767^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×125978618² = 31741224386379848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (125978617) 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, 116543 + ... + 117618.

Almost surely, 2^125978618 is an apocalyptic number.

125978618 is a deficient number, since it is larger than the sum of its proper divisors (63692602).

125978618 is a wasteful number, since it uses less digits than its factorization.

125978618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234432.

The product of its digits is 241920, while the sum is 47.

The square root of 125978618 is about 11224.0196899328. The cubic root of 125978618 is about 501.3014336021.

The spelling of 125978618 in words is "one hundred twenty-five million, nine hundred seventy-eight thousand, six hundred eighteen".