1157425581 has 8 divisors (see below), whose sum is σ = 1661944480. Its totient is φ = 712261872.

The previous prime is 1157425561. The next prime is 1157425589. The reversal of 1157425581 is 1855247511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1157425581 - 2¹⁰ = 1157424557 is a prime.

It is a super-2 number, since 2×1157425581² = 2679267951106375122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 29677579 = 1157425581 / (1 + 1 + 5 + 7 + 4 + 2 + 5 + 5 + 8 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157425589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14838751 + ... + 14838828.

It is an arithmetic number, because the mean of its divisors is an integer number (207743060).

Almost surely, 2^1157425581 is an apocalyptic number.

It is an amenable number.

1157425581 is a deficient number, since it is larger than the sum of its proper divisors (504518899).

1157425581 is a wasteful number, since it uses less digits than its factorization.

1157425581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29677595.

The product of its digits is 56000, while the sum is 39.

The square root of 1157425581 is about 34020.9579671120. The cubic root of 1157425581 is about 1049.9397035670.

The spelling of 1157425581 in words is "one billion, one hundred fifty-seven million, four hundred twenty-five thousand, five hundred eighty-one".