42557707 has 2 divisors, whose sum is σ = 42557708. Its totient is φ = 42557706.

The previous prime is 42557657. The next prime is 42557737. The reversal of 42557707 is 70775524.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42557707 - 2¹¹ = 42555659 is a prime.

It is a super-2 number, since 2×42557707² = 3622316850195698, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42557737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21278853 + 21278854.

It is an arithmetic number, because the mean of its divisors is an integer number (21278854).

Almost surely, 2^42557707 is an apocalyptic number.

42557707 is a deficient number, since it is larger than the sum of its proper divisors (1).

42557707 is an equidigital number, since it uses as much as digits as its factorization.

42557707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68600, while the sum is 37.

The square root of 42557707 is about 6523.6268286897. The cubic root of 42557707 is about 349.1344790901.

It can be divided in two parts, 42557 and 707, that added together give a square (43264 = 208²).

The spelling of 42557707 in words is "forty-two million, five hundred fifty-seven thousand, seven hundred seven".