172860057 has 6 divisors (see below), whose sum is σ = 249686762. Its totient is φ = 115240032.

The previous prime is 172860053. The next prime is 172860089. The reversal of 172860057 is 750068271.

It can be written as a sum of positive squares in only one way, i.e., 170537481 + 2322576 = 13059^2 + 1524^2 .

It is not a de Polignac number, because 172860057 - 2² = 172860053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172860053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9603328 + ... + 9603345.

Almost surely, 2^172860057 is an apocalyptic number.

It is an amenable number.

172860057 is a deficient number, since it is larger than the sum of its proper divisors (76826705).

172860057 is a wasteful number, since it uses less digits than its factorization.

172860057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19206679 (or 19206676 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 172860057 is about 13147.6255270676. The cubic root of 172860057 is about 557.0551803142.

The spelling of 172860057 in words is "one hundred seventy-two million, eight hundred sixty thousand, fifty-seven".