3972237 has 16 divisors (see below), whose sum is σ = 5692032. Its totient is φ = 2455040.

The previous prime is 3972233. The next prime is 3972251. The reversal of 3972237 is 7322793.

It is a cyclic number.

It is not a de Polignac number, because 3972237 - 2² = 3972233 is a prime.

3972237 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3972198 and 3972207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3972233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3073 + ... + 4169.

It is an arithmetic number, because the mean of its divisors is an integer number (355752).

Almost surely, 2^3972237 is an apocalyptic number.

It is an amenable number.

3972237 is a deficient number, since it is larger than the sum of its proper divisors (1719795).

3972237 is a wasteful number, since it uses less digits than its factorization.

3972237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188.

The product of its digits is 15876, while the sum is 33.

The square root of 3972237 is about 1993.0471645197. The cubic root of 3972237 is about 158.3719937605.

The spelling of 3972237 in words is "three million, nine hundred seventy-two thousand, two hundred thirty-seven".