85642425 has 36 divisors (see below), whose sum is σ = 167344944. Its totient is φ = 41522400.

The previous prime is 85642421. The next prime is 85642433. The reversal of 85642425 is 52424658.

It is a happy number.

85642425 is a `hidden beast` number, since 8 + 5 + 642 + 4 + 2 + 5 = 666.

It is not a de Polignac number, because 85642425 - 2² = 85642421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85642425.

It is not an unprimeable number, because it can be changed into a prime (85642421) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 14827 + ... + 19776.

Almost surely, 2^85642425 is an apocalyptic number.

It is an amenable number.

85642425 is a deficient number, since it is larger than the sum of its proper divisors (81702519).

85642425 is a wasteful number, since it uses less digits than its factorization.

85642425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34630 (or 34622 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

The square root of 85642425 is about 9254.3192618366. The cubic root of 85642425 is about 440.7878875666.

The spelling of 85642425 in words is "eighty-five million, six hundred forty-two thousand, four hundred twenty-five".