3891242 has 8 divisors (see below), whose sum is σ = 5972736. Its totient is φ = 1900332.

The previous prime is 3891241. The next prime is 3891247. The reversal of 3891242 is 2421983.

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

It is not an unprimeable number, because it can be changed into a prime (3891241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22538 + ... + 22709.

It is an arithmetic number, because the mean of its divisors is an integer number (746592).

Almost surely, 2^3891242 is an apocalyptic number.

3891242 is a deficient number, since it is larger than the sum of its proper divisors (2081494).

3891242 is a wasteful number, since it uses less digits than its factorization.

3891242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45292.

The product of its digits is 3456, while the sum is 29.

The square root of 3891242 is about 1972.6231267021. The cubic root of 3891242 is about 157.2881774957.

The spelling of 3891242 in words is "three million, eight hundred ninety-one thousand, two hundred forty-two".