1509725 has 12 divisors (see below), whose sum is σ = 2139744. Its totient is φ = 1035120.

The previous prime is 1509701. The next prime is 1509727. The reversal of 1509725 is 5279051.

It is not a de Polignac number, because 1509725 - 2¹⁸ = 1247581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1509727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4139 + ... + 4488.

It is an arithmetic number, because the mean of its divisors is an integer number (178312).

2^1509725 is an apocalyptic number.

It is an amenable number.

1509725 is a deficient number, since it is larger than the sum of its proper divisors (630019).

1509725 is an equidigital number, since it uses as much as digits as its factorization.

1509725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8644 (or 8639 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 29.

The square root of 1509725 is about 1228.7086717363. The cubic root of 1509725 is about 114.7182770121.

The spelling of 1509725 in words is "one million, five hundred nine thousand, seven hundred twenty-five".