1164221243 has 8 divisors (see below), whose sum is σ = 1207529040. Its totient is φ = 1121536800.

The previous prime is 1164221207. The next prime is 1164221263. The reversal of 1164221243 is 3421224611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1164221243 - 2⁸ = 1164220987 is a prime.

It is a super-2 number, since 2×1164221243² = 2710822205304930098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1164221263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152033 + ... + 159506.

It is an arithmetic number, because the mean of its divisors is an integer number (150941130).

Almost surely, 2^1164221243 is an apocalyptic number.

1164221243 is a deficient number, since it is larger than the sum of its proper divisors (43307797).

1164221243 is a wasteful number, since it uses less digits than its factorization.

1164221243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311677.

The product of its digits is 2304, while the sum is 26.

The square root of 1164221243 is about 34120.6864379954. The cubic root of 1164221243 is about 1051.9905529447.

Adding to 1164221243 its reverse (3421224611), we get a palindrome (4585445854).

The spelling of 1164221243 in words is "one billion, one hundred sixty-four million, two hundred twenty-one thousand, two hundred forty-three".