42647057 has 2 divisors, whose sum is σ = 42647058. Its totient is φ = 42647056.

The previous prime is 42647021. The next prime is 42647063. The reversal of 42647057 is 75074624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41011216 + 1635841 = 6404^2 + 1279^2 .

It is a cyclic number.

It is not a de Polignac number, because 42647057 - 2⁶ = 42646993 is a prime.

It is a super-2 number, since 2×42647057² = 3637542941522498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42647557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21323528 + 21323529.

It is an arithmetic number, because the mean of its divisors is an integer number (21323529).

Almost surely, 2^42647057 is an apocalyptic number.

It is an amenable number.

42647057 is a deficient number, since it is larger than the sum of its proper divisors (1).

42647057 is an equidigital number, since it uses as much as digits as its factorization.

42647057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47040, while the sum is 35.

The square root of 42647057 is about 6530.4714224932. The cubic root of 42647057 is about 349.3786444982.

The spelling of 42647057 in words is "forty-two million, six hundred forty-seven thousand, fifty-seven".