1091372156 has 24 divisors (see below), whose sum is σ = 2189735520. Its totient is φ = 466232832.

The previous prime is 1091372111. The next prime is 1091372159. The reversal of 1091372156 is 6512731901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091372159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53501 + ... + 71028.

It is an arithmetic number, because the mean of its divisors is an integer number (91238980).

Almost surely, 2^1091372156 is an apocalyptic number.

It is an amenable number.

1091372156 is an abundant number, since it is smaller than the sum of its proper divisors (1098363364).

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

1091372156 is a wasteful number, since it uses less digits than its factorization.

1091372156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124853 (or 124851 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 1091372156 is about 33035.9222059866. The cubic root of 1091372156 is about 1029.5741338073.

The spelling of 1091372156 in words is "one billion, ninety-one million, three hundred seventy-two thousand, one hundred fifty-six".