3972522 has 16 divisors (see below), whose sum is σ = 7983360. Its totient is φ = 1317792.

The previous prime is 3972517. The next prime is 3972523. The reversal of 3972522 is 2252793.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 3972522.

It is not an unprimeable number, because it can be changed into a prime (3972523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147 + ... + 2822.

It is an arithmetic number, because the mean of its divisors is an integer number (498960).

Almost surely, 2^3972522 is an apocalyptic number.

3972522 is an abundant number, since it is smaller than the sum of its proper divisors (4010838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3972522 is a wasteful number, since it uses less digits than its factorization.

3972522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3197.

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

The square root of 3972522 is about 1993.1186617961. The cubic root of 3972522 is about 158.3757812937.

The spelling of 3972522 in words is "three million, nine hundred seventy-two thousand, five hundred twenty-two".