1315540125 has 24 divisors (see below), whose sum is σ = 2371482360. Its totient is φ = 701620800.

The previous prime is 1315540117. The next prime is 1315540133. The reversal of 1315540125 is 5210455131.

It is an interprime number because it is at equal distance from previous prime (1315540117) and next prime (1315540133).

It can be written as a sum of positive squares in 4 ways, for example, as 106378596 + 1209161529 = 10314^2 + 34773^2 .

It is not a de Polignac number, because 1315540125 - 2³ = 1315540117 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 583560 + ... + 585809.

It is an arithmetic number, because the mean of its divisors is an integer number (98811765).

Almost surely, 2^1315540125 is an apocalyptic number.

1315540125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1315540125 is a deficient number, since it is larger than the sum of its proper divisors (1055942235).

1315540125 is a wasteful number, since it uses less digits than its factorization.

1315540125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169390 (or 1169377 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 1315540125 is about 36270.3753082319. The cubic root of 1315540125 is about 1095.7244845870.

Adding to 1315540125 its reverse (5210455131), we get a palindrome (6525995256).

The spelling of 1315540125 in words is "one billion, three hundred fifteen million, five hundred forty thousand, one hundred twenty-five".