1577130725 has 12 divisors (see below), whose sum is σ = 1979206656. Its totient is φ = 1246501680.

The previous prime is 1577130719. The next prime is 1577130727. The reversal of 1577130725 is 5270317751.

It is a de Polignac number, because none of the positive numbers 2^k-1577130725 is a prime.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1577130727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 377957 + ... + 382106.

It is an arithmetic number, because the mean of its divisors is an integer number (164933888).

Almost surely, 2^1577130725 is an apocalyptic number.

It is an amenable number.

1577130725 is a deficient number, since it is larger than the sum of its proper divisors (402075931).

1577130725 is an equidigital number, since it uses as much as digits as its factorization.

1577130725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760156 (or 760151 counting only the distinct ones).

The product of its (nonzero) digits is 51450, while the sum is 38.

The square root of 1577130725 is about 39713.1052047054. The cubic root of 1577130725 is about 1164.0078187518.

The spelling of 1577130725 in words is "one billion, five hundred seventy-seven million, one hundred thirty thousand, seven hundred twenty-five".