1304156221 has 8 divisors (see below), whose sum is σ = 1319782464. Its totient is φ = 1288616160.

The previous prime is 1304156209. The next prime is 1304156239. The reversal of 1304156221 is 1226514031.

It is a happy number.

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 1304156221 - 2⁷ = 1304156093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304156201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9160 + ... + 51886.

It is an arithmetic number, because the mean of its divisors is an integer number (164972808).

Almost surely, 2^1304156221 is an apocalyptic number.

It is an amenable number.

1304156221 is a deficient number, since it is larger than the sum of its proper divisors (15626243).

1304156221 is a wasteful number, since it uses less digits than its factorization.

1304156221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43091.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1304156221 is about 36113.1031759942. The cubic root of 1304156221 is about 1092.5547406273.

The spelling of 1304156221 in words is "one billion, three hundred four million, one hundred fifty-six thousand, two hundred twenty-one".