1155939142 has 16 divisors (see below), whose sum is σ = 1779801264. Its totient is φ = 562860000.

The previous prime is 1155939131. The next prime is 1155939149. The reversal of 1155939142 is 2419395511.

It is a junction number, because it is equal to n+sod(n) for n = 1155939095 and 1155939104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155939149) 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, 34584 + ... + 59227.

It is an arithmetic number, because the mean of its divisors is an integer number (111237579).

Almost surely, 2^1155939142 is an apocalyptic number.

1155939142 is a deficient number, since it is larger than the sum of its proper divisors (623862122).

1155939142 is a wasteful number, since it uses less digits than its factorization.

1155939142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93975.

The product of its digits is 48600, while the sum is 40.

The square root of 1155939142 is about 33999.1050176324. The cubic root of 1155939142 is about 1049.4900447351.

The spelling of 1155939142 in words is "one billion, one hundred fifty-five million, nine hundred thirty-nine thousand, one hundred forty-two".