8149725 has 36 divisors (see below), whose sum is σ = 15112500. Its totient is φ = 4193280.

The previous prime is 8149723. The next prime is 8149733. The reversal of 8149725 is 5279418.

It can be written as a sum of positive squares in 6 ways, for example, as 248004 + 7901721 = 498^2 + 2811^2 .

It is not a de Polignac number, because 8149725 - 2¹ = 8149723 is a prime.

8149725 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 8149725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8149721) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5901 + ... + 7149.

Almost surely, 2^8149725 is an apocalyptic number.

It is an amenable number.

8149725 is a deficient number, since it is larger than the sum of its proper divisors (6962775).

8149725 is a wasteful number, since it uses less digits than its factorization.

8149725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294 (or 1286 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 8149725 is about 2854.7723201685. The cubic root of 8149725 is about 201.2400043902.

The spelling of 8149725 in words is "eight million, one hundred forty-nine thousand, seven hundred twenty-five".