42939513 has 12 divisors (see below), whose sum is σ = 62081968. Its totient is φ = 28599480.

The previous prime is 42939511. The next prime is 42939521. The reversal of 42939513 is 31593924.

It is a happy number.

It is not a de Polignac number, because 42939513 - 2¹ = 42939511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42939511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14358 + ... + 17088.

Almost surely, 2^42939513 is an apocalyptic number.

It is an amenable number.

42939513 is a deficient number, since it is larger than the sum of its proper divisors (19142455).

42939513 is a wasteful number, since it uses less digits than its factorization.

42939513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4484 (or 4481 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 42939513 is about 6552.8248107209. The cubic root of 42939513 is about 350.1754576053.

The spelling of 42939513 in words is "forty-two million, nine hundred thirty-nine thousand, five hundred thirteen".