1100139972 has 24 divisors (see below), whose sum is σ = 2717993376. Its totient is φ = 345141888.

The previous prime is 1100139961. The next prime is 1100139973. The reversal of 1100139972 is 2799310011.

It is not an unprimeable number, because it can be changed into a prime (1100139973) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2696218 + ... + 2696625.

It is an arithmetic number, because the mean of its divisors is an integer number (113249724).

Almost surely, 2^1100139972 is an apocalyptic number.

1100139972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1100139972 is an abundant number, since it is smaller than the sum of its proper divisors (1617853404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1100139972 is a wasteful number, since it uses less digits than its factorization.

1100139972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5392867 (or 5392865 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 33.

The square root of 1100139972 is about 33168.3579937265. The cubic root of 1100139972 is about 1032.3238985425.

Adding to 1100139972 its reverse (2799310011), we get a palindrome (3899449983).

The spelling of 1100139972 in words is "one billion, one hundred million, one hundred thirty-nine thousand, nine hundred seventy-two".