3947242 has 8 divisors (see below), whose sum is σ = 6376356. Its totient is φ = 1821792.

The previous prime is 3947233. The next prime is 3947297. The reversal of 3947242 is 2427493.

It can be written as a sum of positive squares in 2 ways, for example, as 3837681 + 109561 = 1959^2 + 331^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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, 75883 + ... + 75934.

Almost surely, 2^3947242 is an apocalyptic number.

3947242 is a deficient number, since it is larger than the sum of its proper divisors (2429114).

3947242 is a wasteful number, since it uses less digits than its factorization.

3947242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151832.

The product of its digits is 12096, while the sum is 31.

The square root of 3947242 is about 1986.7667200756. The cubic root of 3947242 is about 158.0391133204.

The spelling of 3947242 in words is "three million, nine hundred forty-seven thousand, two hundred forty-two".