442495921 has 24 divisors (see below), whose sum is σ = 543533760. Its totient is φ = 358192800.

The previous prime is 442495901. The next prime is 442495951. The reversal of 442495921 is 129594244.

It is not a de Polignac number, because 442495921 - 2⁹ = 442495409 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (442495901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 428676 + ... + 429706.

It is an arithmetic number, because the mean of its divisors is an integer number (22647240).

Almost surely, 2^442495921 is an apocalyptic number.

It is an amenable number.

442495921 is a deficient number, since it is larger than the sum of its proper divisors (101037839).

442495921 is a wasteful number, since it uses less digits than its factorization.

442495921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525 (or 1518 counting only the distinct ones).

The product of its digits is 103680, while the sum is 40.

The square root of 442495921 is about 21035.5870134399. The cubic root of 442495921 is about 762.0259432982.

The spelling of 442495921 in words is "four hundred forty-two million, four hundred ninety-five thousand, nine hundred twenty-one".