1313446421 has 24 divisors (see below), whose sum is σ = 1624034880. Its totient is φ = 1056125952.

The previous prime is 1313446363. The next prime is 1313446427. The reversal of 1313446421 is 1246443131.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1313446421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313446427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89045 + ... + 102741.

It is an arithmetic number, because the mean of its divisors is an integer number (67668120).

Almost surely, 2^1313446421 is an apocalyptic number.

It is an amenable number.

1313446421 is a deficient number, since it is larger than the sum of its proper divisors (310588459).

1313446421 is a wasteful number, since it uses less digits than its factorization.

1313446421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13833 (or 13826 counting only the distinct ones).

The product of its digits is 6912, while the sum is 29.

The square root of 1313446421 is about 36241.5013623884. The cubic root of 1313446421 is about 1095.1428880208.

Adding to 1313446421 its reverse (1246443131), we get a palindrome (2559889552).

The spelling of 1313446421 in words is "one billion, three hundred thirteen million, four hundred forty-six thousand, four hundred twenty-one".