1156748121 has 15 divisors (see below), whose sum is σ = 1728439141. Its totient is φ = 770961348.

The previous prime is 1156748113. The next prime is 1156748137. The reversal of 1156748121 is 1218476511.

The square root of 1156748121 is 34011.

It is a perfect power (a square), and thus also a powerful number.

1156748121 is a `hidden beast` number, since 1 + 156 + 7 + 481 + 21 = 666.

It is not a de Polignac number, because 1156748121 - 2³ = 1156748113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1156748921) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 304210 + ... + 307988.

Almost surely, 2^1156748121 is an apocalyptic number.

1156748121 is the 34011-st square number.

1156748121 is the 17006-th centered octagonal number.

It is an amenable number.

1156748121 is a deficient number, since it is larger than the sum of its proper divisors (571691020).

1156748121 is an frugal number, since it uses more digits than its factorization.

1156748121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7570 (or 3782 counting only the distinct ones).

The product of its digits is 13440, while the sum is 36.

The cubic root of 1156748121 is about 1049.7348146638.

Multiplying 1156748121 by its sum of digits (36), we get a square (41642932356 = 204066²).

The spelling of 1156748121 in words is "one billion, one hundred fifty-six million, seven hundred forty-eight thousand, one hundred twenty-one".