125239986 has 64 divisors (see below), whose sum is σ = 296472960. Its totient is φ = 39052800.

The previous prime is 125239979. The next prime is 125239993. The reversal of 125239986 is 689932521.

125239986 is a `hidden beast` number, since 1 + 252 + 399 + 8 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (125239979) and next prime (125239993).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 208086 + ... + 208686.

It is an arithmetic number, because the mean of its divisors is an integer number (4632390).

Almost surely, 2^125239986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125239986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148236480).

125239986 is an abundant number, since it is smaller than the sum of its proper divisors (171232974).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125239986 is a wasteful number, since it uses less digits than its factorization.

125239986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856 (or 850 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 125239986 is about 11191.0672413314. The cubic root of 125239986 is about 500.3197767754.

The spelling of 125239986 in words is "one hundred twenty-five million, two hundred thirty-nine thousand, nine hundred eighty-six".