42557025 has 48 divisors (see below), whose sum is σ = 81296384. Its totient is φ = 19241280.

The previous prime is 42556999. The next prime is 42557051. The reversal of 42557025 is 52075524.

It is an interprime number because it is at equal distance from previous prime (42556999) and next prime (42557051).

It is not a de Polignac number, because 42557025 - 2⁶ = 42556961 is a prime.

It is a super-2 number, since 2×42557025² = 3622200753701250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42556983 and 42557001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 53682 + ... + 54468.

Almost surely, 2^42557025 is an apocalyptic number.

It is an amenable number.

42557025 is a deficient number, since it is larger than the sum of its proper divisors (38739359).

42557025 is a wasteful number, since it uses less digits than its factorization.

42557025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910 (or 905 counting only the distinct ones).

The product of its (nonzero) digits is 14000, while the sum is 30.

The square root of 42557025 is about 6523.5745569435. The cubic root of 42557025 is about 349.1326140853.

The spelling of 42557025 in words is "forty-two million, five hundred fifty-seven thousand, twenty-five".