3972225 has 12 divisors (see below), whose sum is σ = 6567536. Its totient is φ = 2118480.

The previous prime is 3972223. The next prime is 3972233. The reversal of 3972225 is 5222793.

It is a happy number.

It is not a de Polignac number, because 3972225 - 2¹ = 3972223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3972192 and 3972201.

It is not an unprimeable number, because it can be changed into a prime (3972223) 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, 26407 + ... + 26556.

Almost surely, 2^3972225 is an apocalyptic number.

It is an amenable number.

3972225 is a deficient number, since it is larger than the sum of its proper divisors (2595311).

3972225 is a wasteful number, since it uses less digits than its factorization.

3972225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52976 (or 52971 counting only the distinct ones).

The product of its digits is 7560, while the sum is 30.

The square root of 3972225 is about 1993.0441540518. The cubic root of 3972225 is about 158.3718342814.

The spelling of 3972225 in words is "three million, nine hundred seventy-two thousand, two hundred twenty-five".