42455025 has 36 divisors (see below), whose sum is σ = 80051920. Its totient is φ = 21448800.

The previous prime is 42455011. The next prime is 42455029. The reversal of 42455025 is 52055424.

It is not a de Polignac number, because 42455025 - 2⁷ = 42454897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42455025.

It is not an unprimeable number, because it can be changed into a prime (42455029) 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, 691 + ... + 9240.

Almost surely, 2^42455025 is an apocalyptic number.

42455025 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42455025 is a deficient number, since it is larger than the sum of its proper divisors (37596895).

42455025 is a wasteful number, since it uses less digits than its factorization.

42455025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9966 (or 9958 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The square root of 42455025 is about 6515.7520671063. The cubic root of 42455025 is about 348.8534591112.

The spelling of 42455025 in words is "forty-two million, four hundred fifty-five thousand, twenty-five".