391412 has 18 divisors (see below), whose sum is σ = 797202. Its totient is φ = 167664.

The previous prime is 391403. The next prime is 391441. The reversal of 391412 is 214193.

It can be written as a sum of positive squares in only one way, i.e., 226576 + 164836 = 476^2 + 406^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 803 + ... + 1194.

It is an arithmetic number, because the mean of its divisors is an integer number (44289).

2³⁹¹⁴¹² is an apocalyptic number.

It is an amenable number.

391412 is an abundant number, since it is smaller than the sum of its proper divisors (405790).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

391412 is a wasteful number, since it uses less digits than its factorization.

391412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2015 (or 2006 counting only the distinct ones).

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

The square root of 391412 is about 625.6292832021. The cubic root of 391412 is about 73.1495028316.

The spelling of 391412 in words is "three hundred ninety-one thousand, four hundred twelve".