57121706 has 16 divisors (see below), whose sum is σ = 88822440. Its totient is φ = 27518400.

The previous prime is 57121693. The next prime is 57121741. The reversal of 57121706 is 60712175.

It can be written as a sum of positive squares in 4 ways, for example, as 33744481 + 23377225 = 5809^2 + 4835^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43256 + ... + 44556.

Almost surely, 2^57121706 is an apocalyptic number.

57121706 is a deficient number, since it is larger than the sum of its proper divisors (31700734).

57121706 is a wasteful number, since it uses less digits than its factorization.

57121706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2089.

The product of its (nonzero) digits is 2940, while the sum is 29.

The square root of 57121706 is about 7557.8903141022. The cubic root of 57121706 is about 385.1238281622.

The spelling of 57121706 in words is "fifty-seven million, one hundred twenty-one thousand, seven hundred six".