481391 has 4 divisors (see below), whose sum is σ = 482784. Its totient is φ = 480000.

The previous prime is 481387. The next prime is 481409. The reversal of 481391 is 193184.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 481391 - 2² = 481387 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 481391.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 481391.

It is not an unprimeable number, because it can be changed into a prime (481301) 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, 266 + ... + 1016.

It is an arithmetic number, because the mean of its divisors is an integer number (120696).

2⁴⁸¹³⁹¹ is an apocalyptic number.

481391 is a deficient number, since it is larger than the sum of its proper divisors (1393).

481391 is an equidigital number, since it uses as much as digits as its factorization.

481391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392.

The product of its digits is 864, while the sum is 26.

The square root of 481391 is about 693.8234645787. The cubic root of 481391 is about 78.3729129492.

The spelling of 481391 in words is "four hundred eighty-one thousand, three hundred ninety-one".