1159493721 has 12 divisors (see below), whose sum is σ = 1642282992. Its totient is φ = 727524928.

The previous prime is 1159493711. The next prime is 1159493729. The reversal of 1159493721 is 1273949511.

It is not a de Polignac number, because 1159493721 - 2⁷ = 1159493593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1159493729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 667815 + ... + 669548.

It is an arithmetic number, because the mean of its divisors is an integer number (136856916).

Almost surely, 2^1159493721 is an apocalyptic number.

It is an amenable number.

1159493721 is a deficient number, since it is larger than the sum of its proper divisors (482789271).

1159493721 is a wasteful number, since it uses less digits than its factorization.

1159493721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1337400 (or 1337383 counting only the distinct ones).

The product of its digits is 68040, while the sum is 42.

The square root of 1159493721 is about 34051.3394890715. The cubic root of 1159493721 is about 1050.5646912653.

The spelling of 1159493721 in words is "one billion, one hundred fifty-nine million, four hundred ninety-three thousand, seven hundred twenty-one".