921442 has 4 divisors (see below), whose sum is σ = 1382166. Its totient is φ = 460720.

The previous prime is 921409. The next prime is 921457. The reversal of 921442 is 244129.

921442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 641601 + 279841 = 801^2 + 529^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230359 + ... + 230362.

2⁹²¹⁴⁴² is an apocalyptic number.

921442 is a deficient number, since it is larger than the sum of its proper divisors (460724).

921442 is a wasteful number, since it uses less digits than its factorization.

921442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460723.

The product of its digits is 576, while the sum is 22.

The square root of 921442 is about 959.9177048060. The cubic root of 921442 is about 97.3096703387.

The spelling of 921442 in words is "nine hundred twenty-one thousand, four hundred forty-two".