1157626121 has 4 divisors (see below), whose sum is σ = 1182256512. Its totient is φ = 1132995732.

The previous prime is 1157626111. The next prime is 1157626123. The reversal of 1157626121 is 1216267511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1157626121 - 2²⁶ = 1090517257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1157626123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12315125 + ... + 12315218.

It is an arithmetic number, because the mean of its divisors is an integer number (295564128).

Almost surely, 2^1157626121 is an apocalyptic number.

It is an amenable number.

1157626121 is a deficient number, since it is larger than the sum of its proper divisors (24630391).

1157626121 is an equidigital number, since it uses as much as digits as its factorization.

1157626121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24630390.

The product of its digits is 5040, while the sum is 32.

The square root of 1157626121 is about 34023.9051403568. The cubic root of 1157626121 is about 1050.0003389266. Note that the first 3 decimals are identical.

The spelling of 1157626121 in words is "one billion, one hundred fifty-seven million, six hundred twenty-six thousand, one hundred twenty-one".