3725009 has 4 divisors (see below), whose sum is σ = 3729204. Its totient is φ = 3720816.

The previous prime is 3724997. The next prime is 3725017. The reversal of 3725009 is 9005273.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9005273 = 1097 ⋅8209.

It can be written as a sum of positive squares in 2 ways, for example, as 3330625 + 394384 = 1825^2 + 628^2 .

It is a cyclic number.

It is not a de Polignac number, because 3725009 - 2⁴ = 3724993 is a prime.

It is a super-3 number, since 3×3725009³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3725069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182 + ... + 2735.

It is an arithmetic number, because the mean of its divisors is an integer number (932301).

Almost surely, 2^3725009 is an apocalyptic number.

It is an amenable number.

3725009 is a deficient number, since it is larger than the sum of its proper divisors (4195).

3725009 is a wasteful number, since it uses less digits than its factorization.

3725009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4194.

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 3725009 is about 1930.0282381354. The cubic root of 3725009 is about 155.0157320140.

The spelling of 3725009 in words is "three million, seven hundred twenty-five thousand, nine".