1315121404 has 24 divisors (see below), whose sum is σ = 2446592400. Its totient is φ = 616780800.

The previous prime is 1315121399. The next prime is 1315121419. The reversal of 1315121404 is 4041215131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77989 + ... + 93340.

It is an arithmetic number, because the mean of its divisors is an integer number (101941350).

Almost surely, 2^1315121404 is an apocalyptic number.

It is an amenable number.

1315121404 is a deficient number, since it is larger than the sum of its proper divisors (1131470996).

1315121404 is a wasteful number, since it uses less digits than its factorization.

1315121404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171453 (or 171451 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1315121404 is about 36264.6026312160. The cubic root of 1315121404 is about 1095.6082201648.

Adding to 1315121404 its reverse (4041215131), we get a palindrome (5356336535).

The spelling of 1315121404 in words is "one billion, three hundred fifteen million, one hundred twenty-one thousand, four hundred four".