42640522 has 32 divisors (see below), whose sum is σ = 71928000. Its totient is φ = 18839808.

The previous prime is 42640517. The next prime is 42640553. The reversal of 42640522 is 22504624.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96033 + ... + 96475.

It is an arithmetic number, because the mean of its divisors is an integer number (2247750).

Almost surely, 2^42640522 is an apocalyptic number.

42640522 is a deficient number, since it is larger than the sum of its proper divisors (29287478).

42640522 is a wasteful number, since it uses less digits than its factorization.

42640522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 42640522 is about 6529.9710565974. The cubic root of 42640522 is about 349.3607979672.

The spelling of 42640522 in words is "forty-two million, six hundred forty thousand, five hundred twenty-two".