1157229521 has 24 divisors (see below), whose sum is σ = 1411900800. Its totient is φ = 946307208.

The previous prime is 1157229467. The next prime is 1157229527. The reversal of 1157229521 is 1259227511.

It is a de Polignac number, because none of the positive numbers 2^k-1157229521 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157229527) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3021296 + ... + 3021678.

It is an arithmetic number, because the mean of its divisors is an integer number (58829200).

Almost surely, 2^1157229521 is an apocalyptic number.

It is an amenable number.

1157229521 is a deficient number, since it is larger than the sum of its proper divisors (254671279).

1157229521 is an frugal number, since it uses more digits than its factorization.

1157229521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810 (or 413 counting only the distinct ones).

The product of its digits is 12600, while the sum is 35.

The square root of 1157229521 is about 34018.0763859452. The cubic root of 1157229521 is about 1049.8804160108.

The spelling of 1157229521 in words is "one billion, one hundred fifty-seven million, two hundred twenty-nine thousand, five hundred twenty-one".