391274 has 16 divisors (see below), whose sum is σ = 642600. Its totient is φ = 177600.

The previous prime is 391273. The next prime is 391283. The reversal of 391274 is 472193.

It can be written as a sum of positive squares in 4 ways, for example, as 297025 + 94249 = 545^2 + 307^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (391273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2552 + ... + 2700.

2³⁹¹²⁷⁴ is an apocalyptic number.

391274 is a deficient number, since it is larger than the sum of its proper divisors (251326).

391274 is a wasteful number, since it uses less digits than its factorization.

391274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265.

The product of its digits is 1512, while the sum is 26.

The square root of 391274 is about 625.5189845241. The cubic root of 391274 is about 73.1409050557.

The spelling of 391274 in words is "three hundred ninety-one thousand, two hundred seventy-four".