42551057 has 2 divisors, whose sum is σ = 42551058. Its totient is φ = 42551056.

The previous prime is 42551053. The next prime is 42551107. The reversal of 42551057 is 75015524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39325441 + 3225616 = 6271^2 + 1796^2 .

It is a cyclic number.

It is not a de Polignac number, because 42551057 - 2² = 42551053 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42551053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21275528 + 21275529.

It is an arithmetic number, because the mean of its divisors is an integer number (21275529).

Almost surely, 2^42551057 is an apocalyptic number.

It is an amenable number.

42551057 is a deficient number, since it is larger than the sum of its proper divisors (1).

42551057 is an equidigital number, since it uses as much as digits as its factorization.

42551057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 42551057 is about 6523.1171229712. The cubic root of 42551057 is about 349.1162930756.

The spelling of 42551057 in words is "forty-two million, five hundred fifty-one thousand, fifty-seven".