1157271555 has 32 divisors (see below), whose sum is σ = 2047656960. Its totient is φ = 553409280.

The previous prime is 1157271517. The next prime is 1157271559. The reversal of 1157271555 is 5551727511.

It is not a de Polignac number, because 1157271555 - 2⁶ = 1157271491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1157271559) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35995 + ... + 60084.

It is an arithmetic number, because the mean of its divisors is an integer number (63989280).

Almost surely, 2^1157271555 is an apocalyptic number.

1157271555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1157271555 is a deficient number, since it is larger than the sum of its proper divisors (890385405).

1157271555 is a wasteful number, since it uses less digits than its factorization.

1157271555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96171.

The product of its digits is 61250, while the sum is 39.

The square root of 1157271555 is about 34018.6941989254. The cubic root of 1157271555 is about 1049.8931274445.

The spelling of 1157271555 in words is "one billion, one hundred fifty-seven million, two hundred seventy-one thousand, five hundred fifty-five".