42979402 has 4 divisors (see below), whose sum is σ = 64469106. Its totient is φ = 21489700.

The previous prime is 42979399. The next prime is 42979427. The reversal of 42979402 is 20497924.

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., 40844881 + 2134521 = 6391^2 + 1461^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10744849 + ... + 10744852.

Almost surely, 2^42979402 is an apocalyptic number.

42979402 is a deficient number, since it is larger than the sum of its proper divisors (21489704).

42979402 is a wasteful number, since it uses less digits than its factorization.

42979402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21489703.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 42979402 is about 6555.8677533947. The cubic root of 42979402 is about 350.2838567992.

The spelling of 42979402 in words is "forty-two million, nine hundred seventy-nine thousand, four hundred two".