42865379 has 2 divisors, whose sum is σ = 42865380. Its totient is φ = 42865378.

The previous prime is 42865357. The next prime is 42865391. The reversal of 42865379 is 97356824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42865379 - 2²⁴ = 26088163 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (42865079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21432689 + 21432690.

It is an arithmetic number, because the mean of its divisors is an integer number (21432690).

Almost surely, 2^42865379 is an apocalyptic number.

42865379 is a deficient number, since it is larger than the sum of its proper divisors (1).

42865379 is an equidigital number, since it uses as much as digits as its factorization.

42865379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 44.

The square root of 42865379 is about 6547.1657226620. The cubic root of 42865379 is about 349.9738184497.

The spelling of 42865379 in words is "forty-two million, eight hundred sixty-five thousand, three hundred seventy-nine".