3647725 has 12 divisors (see below), whose sum is σ = 4610196. Its totient is φ = 2862080.

The previous prime is 3647723. The next prime is 3647747. The reversal of 3647725 is 5277463.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 191844 + 3455881 = 438^2 + 1859^2 .

It is not a de Polignac number, because 3647725 - 2¹ = 3647723 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 (3647723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52 + ... + 2701.

It is an arithmetic number, because the mean of its divisors is an integer number (384183).

Almost surely, 2^3647725 is an apocalyptic number.

It is an amenable number.

3647725 is a deficient number, since it is larger than the sum of its proper divisors (962471).

3647725 is a wasteful number, since it uses less digits than its factorization.

3647725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2816 (or 2811 counting only the distinct ones).

The product of its digits is 35280, while the sum is 34.

The square root of 3647725 is about 1909.9018299379. The cubic root of 3647725 is about 153.9361769601.

It can be divided in two parts, 36477 and 25, that multiplied together give a triangular number (911925 = T₁₃₅₀).

The spelling of 3647725 in words is "three million, six hundred forty-seven thousand, seven hundred twenty-five".