1307725 has 18 divisors (see below), whose sum is σ = 1732094. Its totient is φ = 979200.

The previous prime is 1307701. The next prime is 1307729. The reversal of 1307725 is 5277031.

It can be written as a sum of positive squares in 9 ways, for example, as 391876 + 915849 = 626^2 + 957^2 .

It is not a de Polignac number, because 1307725 - 2⁵ = 1307693 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 1307725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1307729) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 7135 + ... + 7315.

2^1307725 is an apocalyptic number.

It is an amenable number.

1307725 is a deficient number, since it is larger than the sum of its proper divisors (424369).

1307725 is a wasteful number, since it uses less digits than its factorization.

1307725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 1470, while the sum is 25.

The square root of 1307725 is about 1143.5580440013. The cubic root of 1307725 is about 109.3550412561.

The spelling of 1307725 in words is "one million, three hundred seven thousand, seven hundred twenty-five".