42522640 has 40 divisors (see below), whose sum is σ = 99165528. Its totient is φ = 16957440.

The previous prime is 42522611. The next prime is 42522677. The reversal of 42522640 is 4622524.

It can be written as a sum of positive squares in 4 ways, for example, as 5992704 + 36529936 = 2448^2 + 6044^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36304 + ... + 37456.

Almost surely, 2^42522640 is an apocalyptic number.

42522640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42522640 is an abundant number, since it is smaller than the sum of its proper divisors (56642888).

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

42522640 is a wasteful number, since it uses less digits than its factorization.

42522640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627 (or 1621 counting only the distinct ones).

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

The square root of 42522640 is about 6520.9385827502. The cubic root of 42522640 is about 349.0385586415.

The spelling of 42522640 in words is "forty-two million, five hundred twenty-two thousand, six hundred forty".