1575117457 has 2 divisors, whose sum is σ = 1575117458. Its totient is φ = 1575117456.

The previous prime is 1575117451. The next prime is 1575117527. The reversal of 1575117457 is 7547115751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1155728016 + 419389441 = 33996^2 + 20479^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1575117457 is a prime.

It is a super-2 number, since 2×1575117457² = 4961990006692293698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1575117451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 787558728 + 787558729.

It is an arithmetic number, because the mean of its divisors is an integer number (787558729).

Almost surely, 2^1575117457 is an apocalyptic number.

It is an amenable number.

1575117457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1575117457 is an equidigital number, since it uses as much as digits as its factorization.

1575117457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 171500, while the sum is 43.

The square root of 1575117457 is about 39687.7494574837. The cubic root of 1575117457 is about 1163.5123076027.

The spelling of 1575117457 in words is "one billion, five hundred seventy-five million, one hundred seventeen thousand, four hundred fifty-seven".