42158025 has 144 divisors (see below), whose sum is σ = 97493760. Its totient is φ = 16934400.

The previous prime is 42158009. The next prime is 42158041. The reversal of 42158025 is 52085124.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42158009) and next prime (42158041).

It is not a de Polignac number, because 42158025 - 2⁴ = 42158009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42158025.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 593740 + ... + 593810.

It is an arithmetic number, because the mean of its divisors is an integer number (677040).

Almost surely, 2^42158025 is an apocalyptic number.

42158025 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42158025 is an abundant number, since it is smaller than the sum of its proper divisors (55335735).

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

42158025 is a wasteful number, since it uses less digits than its factorization.

42158025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 42158025 is about 6492.9211453705. The cubic root of 42158025 is about 348.0380705476.

The spelling of 42158025 in words is "forty-two million, one hundred fifty-eight thousand, twenty-five".