1131613725 has 24 divisors (see below), whose sum is σ = 2041021152. Its totient is φ = 548660800.

The previous prime is 1131613709. The next prime is 1131613733. The reversal of 1131613725 is 5273161311.

It is not a de Polignac number, because 1131613725 - 2⁴ = 1131613709 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1131613692 and 1131613701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 685002 + ... + 686651.

It is an arithmetic number, because the mean of its divisors is an integer number (85042548).

Almost surely, 2^1131613725 is an apocalyptic number.

1131613725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1131613725 is a deficient number, since it is larger than the sum of its proper divisors (909407427).

1131613725 is a wasteful number, since it uses less digits than its factorization.

1131613725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371677 (or 1371672 counting only the distinct ones).

The product of its digits is 3780, while the sum is 30.

The square root of 1131613725 is about 33639.4667763923. The cubic root of 1131613725 is about 1042.0760198761.

It can be divided in two parts, 113161 and 3725, that added together give a triangular number (116886 = T₄₈₃).

The spelling of 1131613725 in words is "one billion, one hundred thirty-one million, six hundred thirteen thousand, seven hundred twenty-five".