1315825 has 24 divisors (see below), whose sum is σ = 1908608. Its totient is φ = 881280.

The previous prime is 1315823. The next prime is 1315837. The reversal of 1315825 is 5285131.

It is a happy number.

It is not a de Polignac number, because 1315825 - 2¹ = 1315823 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1315825.

It is not an unprimeable number, because it can be changed into a prime (1315823) 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, 12724 + ... + 12826.

2^1315825 is an apocalyptic number.

It is an amenable number.

1315825 is a deficient number, since it is larger than the sum of its proper divisors (592783).

1315825 is a wasteful number, since it uses less digits than its factorization.

1315825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 188 counting only the distinct ones).

The product of its digits is 1200, while the sum is 25.

The square root of 1315825 is about 1147.0941548103. The cubic root of 1315825 is about 109.5803570477.

The spelling of 1315825 in words is "one million, three hundred fifteen thousand, eight hundred twenty-five".