3972745 has 16 divisors (see below), whose sum is σ = 5483520. Its totient is φ = 2706624.

The previous prime is 3972737. The next prime is 3972751. The reversal of 3972745 is 5472793.

It is a cyclic number.

It is not a de Polignac number, because 3972745 - 2³ = 3972737 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7551 + ... + 8059.

It is an arithmetic number, because the mean of its divisors is an integer number (342720).

Almost surely, 2^3972745 is an apocalyptic number.

3972745 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3972745 is a deficient number, since it is larger than the sum of its proper divisors (1510775).

3972745 is a wasteful number, since it uses less digits than its factorization.

3972745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744.

The product of its digits is 52920, while the sum is 37.

The square root of 3972745 is about 1993.1746034906. The cubic root of 3972745 is about 158.3787447460.

The spelling of 3972745 in words is "three million, nine hundred seventy-two thousand, seven hundred forty-five".