1364671221 has 4 divisors (see below), whose sum is σ = 1819561632. Its totient is φ = 909780812.

The previous prime is 1364671207. The next prime is 1364671237. The reversal of 1364671221 is 1221764631.

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 not a de Polignac number, because 1364671221 - 2¹⁵ = 1364638453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1364670221) 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, 227445201 + ... + 227445206.

It is an arithmetic number, because the mean of its divisors is an integer number (454890408).

Almost surely, 2^1364671221 is an apocalyptic number.

It is an amenable number.

1364671221 is a deficient number, since it is larger than the sum of its proper divisors (454890411).

1364671221 is an equidigital number, since it uses as much as digits as its factorization.

1364671221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454890410.

The product of its digits is 12096, while the sum is 33.

The square root of 1364671221 is about 36941.4566713334. The cubic root of 1364671221 is about 1109.1986806480.

The spelling of 1364671221 in words is "one billion, three hundred sixty-four million, six hundred seventy-one thousand, two hundred twenty-one".