921042442 has 16 divisors (see below), whose sum is σ = 1455384960. Its totient is φ = 435951072.

The previous prime is 921042403. The next prime is 921042467. The reversal of 921042442 is 244240129.

It is a self number, because there is not a number n which added to its sum of digits gives 921042442.

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, 45558 + ... + 62590.

It is an arithmetic number, because the mean of its divisors is an integer number (90961560).

Almost surely, 2^921042442 is an apocalyptic number.

921042442 is a deficient number, since it is larger than the sum of its proper divisors (534342518).

921042442 is a wasteful number, since it uses less digits than its factorization.

921042442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18477.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 921042442 is about 30348.6810586556. The cubic root of 921042442 is about 972.9560308377.

The spelling of 921042442 in words is "nine hundred twenty-one million, forty-two thousand, four hundred forty-two".