1131256200 has 96 divisors (see below), whose sum is σ = 3691504800. Its totient is φ = 285788160.

The previous prime is 1131256199. The next prime is 1131256201. The reversal of 1131256200 is 26521311.

It is an interprime number because it is at equal distance from previous prime (1131256199) and next prime (1131256201).

It is not an unprimeable number, because it can be changed into a prime (1131256201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38217 + ... + 61016.

It is an arithmetic number, because the mean of its divisors is an integer number (38453175).

Almost surely, 2^1131256200 is an apocalyptic number.

1131256200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131256200 is an abundant number, since it is smaller than the sum of its proper divisors (2560248600).

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

1131256200 is a wasteful number, since it uses less digits than its factorization.

1131256200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99271 (or 99262 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1131256200 is about 33634.1522860321. The cubic root of 1131256200 is about 1041.9662629086.

Adding to 1131256200 its reverse (26521311), we get a palindrome (1157777511).

The spelling of 1131256200 in words is "one billion, one hundred thirty-one million, two hundred fifty-six thousand, two hundred".