1155254131 has 4 divisors (see below), whose sum is σ = 1216057000. Its totient is φ = 1094451264.

The previous prime is 1155254123. The next prime is 1155254137. The reversal of 1155254131 is 1314525511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1155254131 - 2³ = 1155254123 is a prime.

It is a super-2 number, since 2×1155254131² = 2669224214385130322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1155254131.

It is not an unprimeable number, because it can be changed into a prime (1155254137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30401406 + ... + 30401443.

It is an arithmetic number, because the mean of its divisors is an integer number (304014250).

Almost surely, 2^1155254131 is an apocalyptic number.

1155254131 is a deficient number, since it is larger than the sum of its proper divisors (60802869).

1155254131 is an equidigital number, since it uses as much as digits as its factorization.

1155254131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60802868.

The product of its digits is 3000, while the sum is 28.

The square root of 1155254131 is about 33989.0295683769. The cubic root of 1155254131 is about 1049.2826940609.

Adding to 1155254131 its reverse (1314525511), we get a palindrome (2469779642).

The spelling of 1155254131 in words is "one billion, one hundred fifty-five million, two hundred fifty-four thousand, one hundred thirty-one".