494521 has 2 divisors, whose sum is σ = 494522. Its totient is φ = 494520.

The previous prime is 494519. The next prime is 494539. The reversal of 494521 is 125494.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 436921 + 57600 = 661^2 + 240^2 .

It is a cyclic number.

It is not a de Polignac number, because 494521 - 2¹ = 494519 is a prime.

Together with 494519, it forms a pair of twin primes.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (494561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247260 + 247261.

It is an arithmetic number, because the mean of its divisors is an integer number (247261).

2⁴⁹⁴⁵²¹ is an apocalyptic number.

It is an amenable number.

494521 is a deficient number, since it is larger than the sum of its proper divisors (1).

494521 is an equidigital number, since it uses as much as digits as its factorization.

494521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 25.

The square root of 494521 is about 703.2218711047. The cubic root of 494521 is about 79.0790748056.

The spelling of 494521 in words is "four hundred ninety-four thousand, five hundred twenty-one".