1157542347 has 18 divisors (see below), whose sum is σ = 1672351356. Its totient is φ = 711862320.

The previous prime is 1157542307. The next prime is 1157542363. The reversal of 1157542347 is 7432457511.

It is not a de Polignac number, because 1157542347 - 2⁷ = 1157542219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (1157542307) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 765322 + ... + 766832.

Almost surely, 2^1157542347 is an apocalyptic number.

1157542347 is a deficient number, since it is larger than the sum of its proper divisors (514809009).

1157542347 is an frugal number, since it uses more digits than its factorization.

1157542347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3051 (or 1527 counting only the distinct ones).

The product of its digits is 117600, while the sum is 39.

The square root of 1157542347 is about 34022.6740130755. The cubic root of 1157542347 is about 1049.9750098361.

Adding to 1157542347 its reverse (7432457511), we get a palindrome (8589999858).

The spelling of 1157542347 in words is "one billion, one hundred fifty-seven million, five hundred forty-two thousand, three hundred forty-seven".