125421642 has 32 divisors (see below), whose sum is σ = 282648960. Its totient is φ = 41217120.

The previous prime is 125421617. The next prime is 125421643. The reversal of 125421642 is 246124521.

125421642 is a `hidden beast` number, since 12 + 5 + 4 + 2 + 1 + 642 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (125421643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12523 + ... + 20190.

It is an arithmetic number, because the mean of its divisors is an integer number (8832780).

Almost surely, 2^125421642 is an apocalyptic number.

125421642 is an abundant number, since it is smaller than the sum of its proper divisors (157227318).

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

125421642 is a wasteful number, since it uses less digits than its factorization.

125421642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32795 (or 32789 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 125421642 is about 11199.1804164412. The cubic root of 125421642 is about 500.5615584015.

The spelling of 125421642 in words is "one hundred twenty-five million, four hundred twenty-one thousand, six hundred forty-two".