42541657 has 2 divisors, whose sum is σ = 42541658. Its totient is φ = 42541656.

The previous prime is 42541643. The next prime is 42541679. The reversal of 42541657 is 75614524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30680521 + 11861136 = 5539^2 + 3444^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42541657 is a prime.

It is not a weakly prime, because it can be changed into another prime (42541687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21270828 + 21270829.

It is an arithmetic number, because the mean of its divisors is an integer number (21270829).

Almost surely, 2^42541657 is an apocalyptic number.

It is an amenable number.

42541657 is a deficient number, since it is larger than the sum of its proper divisors (1).

42541657 is an equidigital number, since it uses as much as digits as its factorization.

42541657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33600, while the sum is 34.

The square root of 42541657 is about 6522.3965687468. The cubic root of 42541657 is about 349.0905832964.

It can be divided in two parts, 425 and 41657, that multiplied together give a triangular number (17704225 = T₅₉₅₀).

The spelling of 42541657 in words is "forty-two million, five hundred forty-one thousand, six hundred fifty-seven".