125633986 has 4 divisors (see below), whose sum is σ = 188450982. Its totient is φ = 62816992.

The previous prime is 125633983. The next prime is 125633987. The reversal of 125633986 is 689336521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 689336521 = 8803 ⋅78307.

It can be written as a sum of positive squares in only one way, i.e., 104427961 + 21206025 = 10219^2 + 4605^2 .

It is not an unprimeable number, because it can be changed into a prime (125633983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31408495 + ... + 31408498.

Almost surely, 2^125633986 is an apocalyptic number.

125633986 is a deficient number, since it is larger than the sum of its proper divisors (62816996).

125633986 is an equidigital number, since it uses as much as digits as its factorization.

125633986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62816995.

The product of its digits is 233280, while the sum is 43.

The square root of 125633986 is about 11208.6567437851. The cubic root of 125633986 is about 500.8438895662.

The spelling of 125633986 in words is "one hundred twenty-five million, six hundred thirty-three thousand, nine hundred eighty-six".