365491 has 6 divisors (see below), whose sum is σ = 425220. Its totient is φ = 313236.

The previous prime is 365489. The next prime is 365507. The reversal of 365491 is 194563.

It is not a de Polignac number, because 365491 - 2¹ = 365489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (365411) 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 5 ways as a sum of consecutive naturals, for example, 3681 + ... + 3778.

It is an arithmetic number, because the mean of its divisors is an integer number (70870).

2³⁶⁵⁴⁹¹ is an apocalyptic number.

365491 is a deficient number, since it is larger than the sum of its proper divisors (59729).

365491 is an equidigital number, since it uses as much as digits as its factorization.

365491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7473 (or 7466 counting only the distinct ones).

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

The square root of 365491 is about 604.5585166053. The cubic root of 365491 is about 71.4977259779.

The spelling of 365491 in words is "three hundred sixty-five thousand, four hundred ninety-one".