42061257 has 36 divisors (see below), whose sum is σ = 71325696. Its totient is φ = 23814000.

The previous prime is 42061219. The next prime is 42061297. The reversal of 42061257 is 75216024.

42061257 is a `hidden beast` number, since 42 + 0 + 612 + 5 + 7 = 666.

It is not a de Polignac number, because 42061257 - 2⁸ = 42061001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42061257.

It is not an unprimeable number, because it can be changed into a prime (42061207) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 55632 + ... + 56382.

Almost surely, 2^42061257 is an apocalyptic number.

It is an amenable number.

42061257 is a deficient number, since it is larger than the sum of its proper divisors (29264439).

42061257 is a wasteful number, since it uses less digits than its factorization.

42061257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898 (or 888 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 42061257 is about 6485.4650565707. The cubic root of 42061257 is about 347.7715752252.

The spelling of 42061257 in words is "forty-two million, sixty-one thousand, two hundred fifty-seven".