42756379 has 4 divisors (see below), whose sum is σ = 44615376. Its totient is φ = 40897384.

The previous prime is 42756341. The next prime is 42756391. The reversal of 42756379 is 97365724.

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 42756379 - 2¹³ = 42748187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42756079) 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, 929464 + ... + 929509.

It is an arithmetic number, because the mean of its divisors is an integer number (11153844).

Almost surely, 2^42756379 is an apocalyptic number.

42756379 is a deficient number, since it is larger than the sum of its proper divisors (1858997).

42756379 is a wasteful number, since it uses less digits than its factorization.

42756379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1858996.

The product of its digits is 317520, while the sum is 43.

The square root of 42756379 is about 6538.8362114370. The cubic root of 42756379 is about 349.6769236366.

The spelling of 42756379 in words is "forty-two million, seven hundred fifty-six thousand, three hundred seventy-nine".