1131261515 has 8 divisors (see below), whose sum is σ = 1437367680. Its totient is φ = 851773312.

The previous prime is 1131261487. The next prime is 1131261529. The reversal of 1131261515 is 5151621311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1131261515 - 2⁶ = 1131261451 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6654395 + ... + 6654564.

It is an arithmetic number, because the mean of its divisors is an integer number (179670960).

Almost surely, 2^1131261515 is an apocalyptic number.

1131261515 is a deficient number, since it is larger than the sum of its proper divisors (306106165).

1131261515 is a wasteful number, since it uses less digits than its factorization.

1131261515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13308981.

The product of its digits is 900, while the sum is 26.

The square root of 1131261515 is about 33634.2312978905. The cubic root of 1131261515 is about 1041.9678947352.

Adding to 1131261515 its reverse (5151621311), we get a palindrome (6282882826).

It can be divided in two parts, 11312 and 61515, that added together give a palindrome (72827).

The spelling of 1131261515 in words is "one billion, one hundred thirty-one million, two hundred sixty-one thousand, five hundred fifteen".