90021742 has 16 divisors (see below), whose sum is σ = 139973760. Its totient is φ = 43370208.

The previous prime is 90021721. The next prime is 90021751. The reversal of 90021742 is 24712009.

It is a congruent number.

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, 33928 + ... + 36484.

It is an arithmetic number, because the mean of its divisors is an integer number (8748360).

Almost surely, 2^90021742 is an apocalyptic number.

90021742 is a deficient number, since it is larger than the sum of its proper divisors (49952018).

90021742 is a wasteful number, since it uses less digits than its factorization.

90021742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3195.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 90021742 is about 9487.9788153220. The cubic root of 90021742 is about 448.1765586768.

The spelling of 90021742 in words is "ninety million, twenty-one thousand, seven hundred forty-two".