42425985 has 32 divisors (see below), whose sum is σ = 80259840. Its totient is φ = 18724608.

The previous prime is 42425969. The next prime is 42425987. The reversal of 42425985 is 58952424.

It is not a de Polignac number, because 42425985 - 2⁴ = 42425969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42425987) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3922 + ... + 10011.

It is an arithmetic number, because the mean of its divisors is an integer number (2508120).

Almost surely, 2^42425985 is an apocalyptic number.

It is an amenable number.

42425985 is a deficient number, since it is larger than the sum of its proper divisors (37833855).

42425985 is a wasteful number, since it uses less digits than its factorization.

42425985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13977.

The product of its digits is 115200, while the sum is 39.

The square root of 42425985 is about 6513.5232401520. The cubic root of 42425985 is about 348.7739002903.

The spelling of 42425985 in words is "forty-two million, four hundred twenty-five thousand, nine hundred eighty-five".