1171972144 has 20 divisors (see below), whose sum is σ = 2595081424. Its totient is φ = 502273728.

The previous prime is 1171972133. The next prime is 1171972159. The reversal of 1171972144 is 4412791711.

It is a happy 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, 5231907 + ... + 5232130.

Almost surely, 2^1171972144 is an apocalyptic number.

1171972144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1171972144 is an abundant number, since it is smaller than the sum of its proper divisors (1423109280).

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

1171972144 is a wasteful number, since it uses less digits than its factorization.

1171972144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10464052 (or 10464046 counting only the distinct ones).

The product of its digits is 14112, while the sum is 37.

The square root of 1171972144 is about 34234.0786936059. The cubic root of 1171972144 is about 1054.3199630615.

The spelling of 1171972144 in words is "one billion, one hundred seventy-one million, nine hundred seventy-two thousand, one hundred forty-four".