1157142551 has 4 divisors (see below), whose sum is σ = 1188416712. Its totient is φ = 1125868392.

The previous prime is 1157142529. The next prime is 1157142641. The reversal of 1157142551 is 1552417511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1157142551 - 2¹⁴ = 1157126167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157145551) 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, 15637025 + ... + 15637098.

It is an arithmetic number, because the mean of its divisors is an integer number (297104178).

Almost surely, 2^1157142551 is an apocalyptic number.

1157142551 is a deficient number, since it is larger than the sum of its proper divisors (31274161).

1157142551 is an equidigital number, since it uses as much as digits as its factorization.

1157142551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31274160.

The product of its digits is 7000, while the sum is 32.

The square root of 1157142551 is about 34016.7980709531. The cubic root of 1157142551 is about 1049.8541145769.

The spelling of 1157142551 in words is "one billion, one hundred fifty-seven million, one hundred forty-two thousand, five hundred fifty-one".