1164256321 has 4 divisors (see below), whose sum is σ = 1166590000. Its totient is φ = 1161922644.

The previous prime is 1164256283. The next prime is 1164256333. The reversal of 1164256321 is 1236524611.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1164256321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1164256721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1166091 + ... + 1167088.

It is an arithmetic number, because the mean of its divisors is an integer number (291647500).

Almost surely, 2^1164256321 is an apocalyptic number.

It is an amenable number.

1164256321 is a deficient number, since it is larger than the sum of its proper divisors (2333679).

1164256321 is an equidigital number, since it uses as much as digits as its factorization.

1164256321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2333678.

The product of its digits is 8640, while the sum is 31.

The square root of 1164256321 is about 34121.2004624691. The cubic root of 1164256321 is about 1052.0011183346.

The spelling of 1164256321 in words is "one billion, one hundred sixty-four million, two hundred fifty-six thousand, three hundred twenty-one".