391142 has 8 divisors (see below), whose sum is σ = 590016. Its totient is φ = 194472.

The previous prime is 391133. The next prime is 391151. The reversal of 391142 is 241193.

It is an interprime number because it is at equal distance from previous prime (391133) and next prime (391151).

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

It is a congruent number.

It is an unprimeable number.

391142 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8 + ... + 884.

It is an arithmetic number, because the mean of its divisors is an integer number (73752).

2³⁹¹¹⁴² is an apocalyptic number.

391142 is a deficient number, since it is larger than the sum of its proper divisors (198874).

391142 is a wasteful number, since it uses less digits than its factorization.

391142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102.

The product of its digits is 216, while the sum is 20.

The square root of 391142 is about 625.4134632385. The cubic root of 391142 is about 73.1326792043.

The spelling of 391142 in words is "three hundred ninety-one thousand, one hundred forty-two".