3992257 has 2 divisors, whose sum is σ = 3992258. Its totient is φ = 3992256.

The previous prime is 3992251. The next prime is 3992279. The reversal of 3992257 is 7522993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3101121 + 891136 = 1761^2 + 944^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3992257 is a prime.

3992257 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3992251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1996128 + 1996129.

It is an arithmetic number, because the mean of its divisors is an integer number (1996129).

Almost surely, 2^3992257 is an apocalyptic number.

It is an amenable number.

3992257 is a deficient number, since it is larger than the sum of its proper divisors (1).

3992257 is an equidigital number, since it uses as much as digits as its factorization.

3992257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34020, while the sum is 37.

The square root of 3992257 is about 1998.0633123102. The cubic root of 3992257 is about 158.6376119817.

The spelling of 3992257 in words is "three million, nine hundred ninety-two thousand, two hundred fifty-seven".