1131255700 has 18 divisors (see below), whose sum is σ = 2454825086. Its totient is φ = 452502240.

The previous prime is 1131255683. The next prime is 1131255703. The reversal of 1131255700 is 75521311.

It can be written as a sum of positive squares in 3 ways, for example, as 63011844 + 1068243856 = 7938^2 + 32684^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131255703) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5656179 + ... + 5656378.

Almost surely, 2^1131255700 is an apocalyptic number.

1131255700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131255700 is an abundant number, since it is smaller than the sum of its proper divisors (1323569386).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131255700 is a wasteful number, since it uses less digits than its factorization.

1131255700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11312571 (or 11312564 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 25.

The square root of 1131255700 is about 33634.1448531102. The cubic root of 1131255700 is about 1041.9661093969.

The spelling of 1131255700 in words is "one billion, one hundred thirty-one million, two hundred fifty-five thousand, seven hundred".