42774539 has 2 divisors, whose sum is σ = 42774540. Its totient is φ = 42774538.

The previous prime is 42774517. The next prime is 42774577. The reversal of 42774539 is 93547724.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42774539 is a prime.

It is a super-2 number, since 2×42774539² = 3659322373325042, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 42774496 and 42774505.

It is not a weakly prime, because it can be changed into another prime (42774139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21387269 + 21387270.

It is an arithmetic number, because the mean of its divisors is an integer number (21387270).

Almost surely, 2^42774539 is an apocalyptic number.

42774539 is a deficient number, since it is larger than the sum of its proper divisors (1).

42774539 is an equidigital number, since it uses as much as digits as its factorization.

42774539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 41.

The square root of 42774539 is about 6540.2246903298. The cubic root of 42774539 is about 349.7264229493.

The spelling of 42774539 in words is "forty-two million, seven hundred seventy-four thousand, five hundred thirty-nine".