1142120864 has 12 divisors (see below), whose sum is σ = 2248550514. Its totient is φ = 571060416.

The previous prime is 1142120743. The next prime is 1142120869. The reversal of 1142120864 is 4680212411.

It can be written as a sum of positive squares in only one way, i.e., 580810000 + 561310864 = 24100^2 + 23692^2 .

It is not an unprimeable number, because it can be changed into a prime (1142120869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17845607 + ... + 17845670.

Almost surely, 2^1142120864 is an apocalyptic number.

It is an amenable number.

1142120864 is a deficient number, since it is larger than the sum of its proper divisors (1106429650).

1142120864 is an equidigital number, since it uses as much as digits as its factorization.

1142120864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35691287 (or 35691279 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 1142120864 is about 33795.2787235140. The cubic root of 1142120864 is about 1045.2913464642.

The spelling of 1142120864 in words is "one billion, one hundred forty-two million, one hundred twenty thousand, eight hundred sixty-four".