42513739 has 4 divisors (see below), whose sum is σ = 43979760. Its totient is φ = 41047720.

The previous prime is 42513733. The next prime is 42513769. The reversal of 42513739 is 93731524.

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

It is a cyclic number.

It is not a de Polignac number, because 42513739 - 2⁵ = 42513707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42513733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 732967 + ... + 733024.

It is an arithmetic number, because the mean of its divisors is an integer number (10994940).

Almost surely, 2^42513739 is an apocalyptic number.

42513739 is a deficient number, since it is larger than the sum of its proper divisors (1466021).

42513739 is a wasteful number, since it uses less digits than its factorization.

42513739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1466020.

The product of its digits is 22680, while the sum is 34.

The square root of 42513739 is about 6520.2560532544. The cubic root of 42513739 is about 349.0142029179.

The spelling of 42513739 in words is "forty-two million, five hundred thirteen thousand, seven hundred thirty-nine".