3947492 has 12 divisors (see below), whose sum is σ = 6923196. Its totient is φ = 1969440.

The previous prime is 3947491. The next prime is 3947501. The reversal of 3947492 is 2947493.

It can be written as a sum of positive squares in 2 ways, for example, as 3297856 + 649636 = 1816^2 + 806^2 .

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (3947491) 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 3 ways as a sum of consecutive naturals, for example, 1898 + ... + 3390.

It is an arithmetic number, because the mean of its divisors is an integer number (576933).

Almost surely, 2^3947492 is an apocalyptic number.

It is an amenable number.

3947492 is a deficient number, since it is larger than the sum of its proper divisors (2975704).

3947492 is a wasteful number, since it uses less digits than its factorization.

3947492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2158 (or 2156 counting only the distinct ones).

The product of its digits is 54432, while the sum is 38.

The square root of 3947492 is about 1986.8296353739. The cubic root of 3947492 is about 158.0424497381.

Subtracting from 3947492 its reverse (2947493), we obtain a palindrome (999999).

The spelling of 3947492 in words is "three million, nine hundred forty-seven thousand, four hundred ninety-two".