1155542992 has 20 divisors (see below), whose sum is σ = 2260604320. Its totient is φ = 572161248.

The previous prime is 1155542957. The next prime is 1155543043. The reversal of 1155542992 is 2992455511.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348942 + ... + 352237.

It is an arithmetic number, because the mean of its divisors is an integer number (113030216).

Almost surely, 2^1155542992 is an apocalyptic number.

It is an amenable number.

1155542992 is a deficient number, since it is larger than the sum of its proper divisors (1105061328).

1155542992 is a wasteful number, since it uses less digits than its factorization.

1155542992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701290 (or 701284 counting only the distinct ones).

The product of its digits is 162000, while the sum is 43.

The square root of 1155542992 is about 33993.2786297527. The cubic root of 1155542992 is about 1049.3701413684.

The spelling of 1155542992 in words is "one billion, one hundred fifty-five million, five hundred forty-two thousand, nine hundred ninety-two".