356491 has 4 divisors (see below), whose sum is σ = 361584. Its totient is φ = 351400.

The previous prime is 356479. The next prime is 356501. The reversal of 356491 is 194653.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 356491 - 2¹¹ = 354443 is a prime.

It is a Duffinian number.

356491 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (356441) 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, 2440 + ... + 2581.

It is an arithmetic number, because the mean of its divisors is an integer number (90396).

2³⁵⁶⁴⁹¹ is an apocalyptic number.

356491 is a deficient number, since it is larger than the sum of its proper divisors (5093).

356491 is an equidigital number, since it uses as much as digits as its factorization.

356491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5092.

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

The square root of 356491 is about 597.0686727672. The cubic root of 356491 is about 70.9059788346.

It can be divided in two parts, 3564 and 91, that added together give a triangular number (3655 = T₈₅).

The spelling of 356491 in words is "three hundred fifty-six thousand, four hundred ninety-one".