1315404321 has 16 divisors (see below), whose sum is σ = 2186646528. Its totient is φ = 683326800.

The previous prime is 1315404313. The next prime is 1315404373. The reversal of 1315404321 is 1234045131.

It is a happy number.

It is not a de Polignac number, because 1315404321 - 2³ = 1315404313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1315404291 and 1315404300.

It is not an unprimeable number, because it can be changed into a prime (1315404421) 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, 2846965 + ... + 2847426.

It is an arithmetic number, because the mean of its divisors is an integer number (136665408).

Almost surely, 2^1315404321 is an apocalyptic number.

1315404321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1315404321 is a deficient number, since it is larger than the sum of its proper divisors (871242207).

1315404321 is a wasteful number, since it uses less digits than its factorization.

1315404321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5694412.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1315404321 is about 36268.5031535629. The cubic root of 1315404321 is about 1095.6867791899.

Adding to 1315404321 its reverse (1234045131), we get a palindrome (2549449452).

The spelling of 1315404321 in words is "one billion, three hundred fifteen million, four hundred four thousand, three hundred twenty-one".