1057172185 has 8 divisors (see below), whose sum is σ = 1292542920. Its totient is φ = 829780224.

The previous prime is 1057172153. The next prime is 1057172201. The reversal of 1057172185 is 5812717501.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 183142089 + 874030096 = 13533^2 + 29564^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1057172185 - 2⁵ = 1057172153 is a prime.

It is a super-2 number, since 2×1057172185² = 2235226057475348450, which contains 22 as substring.

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, 1994400 + ... + 1994929.

It is an arithmetic number, because the mean of its divisors is an integer number (161567865).

Almost surely, 2^1057172185 is an apocalyptic number.

It is an amenable number.

1057172185 is a deficient number, since it is larger than the sum of its proper divisors (235370735).

1057172185 is an equidigital number, since it uses as much as digits as its factorization.

1057172185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3989387.

The product of its (nonzero) digits is 19600, while the sum is 37.

The square root of 1057172185 is about 32514.1843662116. The cubic root of 1057172185 is about 1018.7053242481.

Adding to 1057172185 its reverse (5812717501), we get a palindrome (6869889686).

The spelling of 1057172185 in words is "one billion, fifty-seven million, one hundred seventy-two thousand, one hundred eighty-five".