42520890 has 16 divisors (see below), whose sum is σ = 102050208. Its totient is φ = 11338896.

The previous prime is 42520889. The next prime is 42520903. The reversal of 42520890 is 9802524.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 1417363 = 42520890 / (4 + 2 + 5 + 2 + 0 + 8 + 9 + 0).

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 7 ways as a sum of consecutive naturals, for example, 708652 + ... + 708711.

It is an arithmetic number, because the mean of its divisors is an integer number (6378138).

Almost surely, 2^42520890 is an apocalyptic number.

42520890 is an abundant number, since it is smaller than the sum of its proper divisors (59529318).

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

42520890 is a wasteful number, since it uses less digits than its factorization.

42520890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1417373.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 42520890 is about 6520.8043982319. The cubic root of 42520890 is about 349.0337704012.

The spelling of 42520890 in words is "forty-two million, five hundred twenty thousand, eight hundred ninety".