1157856841 has 4 divisors (see below), whose sum is σ = 1166973952. Its totient is φ = 1148739732.

The previous prime is 1157856811. The next prime is 1157856863. The reversal of 1157856841 is 1486587511.

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 1157856841 - 2²⁹ = 620985929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1157856791 and 1157856800.

It is not an unprimeable number, because it can be changed into a prime (1157856811) 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, 4558365 + ... + 4558618.

It is an arithmetic number, because the mean of its divisors is an integer number (291743488).

Almost surely, 2^1157856841 is an apocalyptic number.

It is an amenable number.

1157856841 is a deficient number, since it is larger than the sum of its proper divisors (9117111).

1157856841 is an equidigital number, since it uses as much as digits as its factorization.

1157856841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9117110.

The product of its digits is 268800, while the sum is 46.

The square root of 1157856841 is about 34027.2955287369. The cubic root of 1157856841 is about 1050.0700908615.

The spelling of 1157856841 in words is "one billion, one hundred fifty-seven million, eight hundred fifty-six thousand, eight hundred forty-one".