3972851 has 2 divisors, whose sum is σ = 3972852. Its totient is φ = 3972850.

The previous prime is 3972841. The next prime is 3972877. The reversal of 3972851 is 1582793.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3972851 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (3972811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1986425 + 1986426.

It is an arithmetic number, because the mean of its divisors is an integer number (1986426).

Almost surely, 2^3972851 is an apocalyptic number.

3972851 is a deficient number, since it is larger than the sum of its proper divisors (1).

3972851 is an equidigital number, since it uses as much as digits as its factorization.

3972851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 35.

The square root of 3972851 is about 1993.2011940594. The cubic root of 3972851 is about 158.3801533436.

The spelling of 3972851 in words is "three million, nine hundred seventy-two thousand, eight hundred fifty-one".