42010657 has 4 divisors (see below), whose sum is σ = 45242260. Its totient is φ = 38779056.

The previous prime is 42010649. The next prime is 42010681. The reversal of 42010657 is 75601024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3272481 + 38738176 = 1809^2 + 6224^2 .

It is a cyclic number.

It is not a de Polignac number, because 42010657 - 2³ = 42010649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42010637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1615782 + ... + 1615807.

It is an arithmetic number, because the mean of its divisors is an integer number (11310565).

Almost surely, 2^42010657 is an apocalyptic number.

It is an amenable number.

42010657 is a deficient number, since it is larger than the sum of its proper divisors (3231603).

42010657 is a wasteful number, since it uses less digits than its factorization.

42010657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3231602.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 42010657 is about 6481.5628516585. The cubic root of 42010657 is about 347.6320620150.

The spelling of 42010657 in words is "forty-two million, ten thousand, six hundred fifty-seven".