1147557201 has 16 divisors (see below), whose sum is σ = 1751278464. Its totient is φ = 654764544.

The previous prime is 1147557199. The next prime is 1147557209. The reversal of 1147557201 is 1027557411.

It is not a de Polignac number, because 1147557201 - 2¹ = 1147557199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1147557209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26466 + ... + 54731.

It is an arithmetic number, because the mean of its divisors is an integer number (109454904).

Almost surely, 2^1147557201 is an apocalyptic number.

It is an amenable number.

1147557201 is a deficient number, since it is larger than the sum of its proper divisors (603721263).

1147557201 is an equidigital number, since it uses as much as digits as its factorization.

1147557201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81880.

The product of its (nonzero) digits is 9800, while the sum is 33.

The square root of 1147557201 is about 33875.6136623383. The cubic root of 1147557201 is about 1046.9472026607.

The spelling of 1147557201 in words is "one billion, one hundred forty-seven million, five hundred fifty-seven thousand, two hundred one".