42189057 has 6 divisors (see below), whose sum is σ = 60939762. Its totient is φ = 28126032.

The previous prime is 42188989. The next prime is 42189067. The reversal of 42189057 is 75098124.

It can be written as a sum of positive squares in only one way, i.e., 22127616 + 20061441 = 4704^2 + 4479^2 .

It is not a de Polignac number, because 42189057 - 2¹⁴ = 42172673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42189067) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2343828 + ... + 2343845.

It is an arithmetic number, because the mean of its divisors is an integer number (10156627).

Almost surely, 2^42189057 is an apocalyptic number.

It is an amenable number.

42189057 is a deficient number, since it is larger than the sum of its proper divisors (18750705).

42189057 is a wasteful number, since it uses less digits than its factorization.

42189057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4687679 (or 4687676 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 42189057 is about 6495.3103851933. The cubic root of 42189057 is about 348.1234451076.

The spelling of 42189057 in words is "forty-two million, one hundred eighty-nine thousand, fifty-seven".