42251490 has 32 divisors (see below), whose sum is σ = 112671360. Its totient is φ = 11266992.

The previous prime is 42251471. The next prime is 42251509. The reversal of 42251490 is 9415224.

It is an interprime number because it is at equal distance from previous prime (42251471) and next prime (42251509).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77974 + ... + 78513.

It is an arithmetic number, because the mean of its divisors is an integer number (3520980).

Almost surely, 2^42251490 is an apocalyptic number.

42251490 is an abundant number, since it is smaller than the sum of its proper divisors (70419870).

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

42251490 is a wasteful number, since it uses less digits than its factorization.

42251490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156503 (or 156497 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 42251490 is about 6500.1146143741. The cubic root of 42251490 is about 348.2950826543.

The spelling of 42251490 in words is "forty-two million, two hundred fifty-one thousand, four hundred ninety".