1157512011 has 4 divisors (see below), whose sum is σ = 1543349352. Its totient is φ = 771674672.

The previous prime is 1157511991. The next prime is 1157512021. The reversal of 1157512011 is 1102157511.

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 1157512011 - 2⁶ = 1157511947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1157512021) 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, 192918666 + ... + 192918671.

It is an arithmetic number, because the mean of its divisors is an integer number (385837338).

Almost surely, 2^1157512011 is an apocalyptic number.

1157512011 is a deficient number, since it is larger than the sum of its proper divisors (385837341).

1157512011 is an equidigital number, since it uses as much as digits as its factorization.

1157512011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385837340.

The product of its (nonzero) digits is 350, while the sum is 24.

The square root of 1157512011 is about 34022.2281898173. The cubic root of 1157512011 is about 1049.9658374373.

Adding to 1157512011 its reverse (1102157511), we get a palindrome (2259669522).

The spelling of 1157512011 in words is "one billion, one hundred fifty-seven million, five hundred twelve thousand, eleven".