1315900421 has 16 divisors (see below), whose sum is σ = 1451520000. Its totient is φ = 1183023600.

The previous prime is 1315900379. The next prime is 1315900427. The reversal of 1315900421 is 1240095131.

It is a de Polignac number, because none of the positive numbers 2^k-1315900421 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 (1315900427) 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, 374330 + ... + 377828.

It is an arithmetic number, because the mean of its divisors is an integer number (90720000).

Almost surely, 2^1315900421 is an apocalyptic number.

1315900421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1315900421 is a deficient number, since it is larger than the sum of its proper divisors (135619579).

1315900421 is a wasteful number, since it uses less digits than its factorization.

1315900421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3880.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1315900421 is about 36275.3417764740. The cubic root of 1315900421 is about 1095.8245066504.

Adding to 1315900421 its reverse (1240095131), we get a palindrome (2555995552).

The spelling of 1315900421 in words is "one billion, three hundred fifteen million, nine hundred thousand, four hundred twenty-one".