42979516 has 24 divisors (see below), whose sum is σ = 77987840. Its totient is φ = 20703600.

The previous prime is 42979507. The next prime is 42979523. The reversal of 42979516 is 61597924.

It is a happy number.

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, 32965 + ... + 34243.

Almost surely, 2^42979516 is an apocalyptic number.

It is an amenable number.

42979516 is a deficient number, since it is larger than the sum of its proper divisors (35008324).

42979516 is a wasteful number, since it uses less digits than its factorization.

42979516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1585 (or 1583 counting only the distinct ones).

The product of its digits is 136080, while the sum is 43.

The square root of 42979516 is about 6555.8764478901. The cubic root of 42979516 is about 350.2841665005.

The spelling of 42979516 in words is "forty-two million, nine hundred seventy-nine thousand, five hundred sixteen".