1157261357 has 4 divisors (see below), whose sum is σ = 1322584416. Its totient is φ = 991938300.

The previous prime is 1157261311. The next prime is 1157261381. The reversal of 1157261357 is 7531627511.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7531627511 = 3413 ⋅2206747.

It is a cyclic number.

It is not a de Polignac number, because 1157261357 - 2⁶ = 1157261293 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1157261357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157261387) 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, 82661519 + ... + 82661532.

It is an arithmetic number, because the mean of its divisors is an integer number (330646104).

Almost surely, 2^1157261357 is an apocalyptic number.

It is an amenable number.

1157261357 is a deficient number, since it is larger than the sum of its proper divisors (165323059).

1157261357 is an equidigital number, since it uses as much as digits as its factorization.

1157261357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165323058.

The product of its digits is 44100, while the sum is 38.

The square root of 1157261357 is about 34018.5443104199. The cubic root of 1157261357 is about 1049.8900435122.

Adding to 1157261357 its reverse (7531627511), we get a palindrome (8688888868).

The spelling of 1157261357 in words is "one billion, one hundred fifty-seven million, two hundred sixty-one thousand, three hundred fifty-seven".