456391 has 4 divisors (see below), whose sum is σ = 491512. Its totient is φ = 421272.

The previous prime is 456377. The next prime is 456403. The reversal of 456391 is 193654.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 193654 = 2 ⋅96827.

It is a cyclic number.

It is not a de Polignac number, because 456391 - 2¹³ = 448199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (456091) by changing a digit.

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, 17541 + ... + 17566.

It is an arithmetic number, because the mean of its divisors is an integer number (122878).

2⁴⁵⁶³⁹¹ is an apocalyptic number.

456391 is a deficient number, since it is larger than the sum of its proper divisors (35121).

456391 is a wasteful number, since it uses less digits than its factorization.

456391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35120.

The product of its digits is 3240, while the sum is 28.

The square root of 456391 is about 675.5671691253. The cubic root of 456391 is about 76.9920158135.

The spelling of 456391 in words is "four hundred fifty-six thousand, three hundred ninety-one".