1304225391 has 16 divisors (see below), whose sum is σ = 1990027008. Its totient is φ = 744283200.

The previous prime is 1304225387. The next prime is 1304225401. The reversal of 1304225391 is 1935224031.

It is not a de Polignac number, because 1304225391 - 2² = 1304225387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304225311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24825 + ... + 56786.

It is an arithmetic number, because the mean of its divisors is an integer number (124376688).

Almost surely, 2^1304225391 is an apocalyptic number.

1304225391 is a deficient number, since it is larger than the sum of its proper divisors (685801617).

1304225391 is an equidigital number, since it uses as much as digits as its factorization.

1304225391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82382.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 1304225391 is about 36114.0608489270. The cubic root of 1304225391 is about 1092.5740559706.

The spelling of 1304225391 in words is "one billion, three hundred four million, two hundred twenty-five thousand, three hundred ninety-one".