1155232139 has 8 divisors (see below), whose sum is σ = 1195508160. Its totient is φ = 1114985536.

The previous prime is 1155232121. The next prime is 1155232147. The reversal of 1155232139 is 9312325511.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1155232139 is a prime.

It is a super-2 number, since 2×1155232139² = 2669122589957030642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1155232159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98654 + ... + 109740.

It is an arithmetic number, because the mean of its divisors is an integer number (149438520).

Almost surely, 2^1155232139 is an apocalyptic number.

1155232139 is a deficient number, since it is larger than the sum of its proper divisors (40276021).

1155232139 is a wasteful number, since it uses less digits than its factorization.

1155232139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14709.

The product of its digits is 8100, while the sum is 32.

The square root of 1155232139 is about 33988.7060506869. The cubic root of 1155232139 is about 1049.2760357939.

The spelling of 1155232139 in words is "one billion, one hundred fifty-five million, two hundred thirty-two thousand, one hundred thirty-nine".