495421 has 2 divisors, whose sum is σ = 495422. Its totient is φ = 495420.

The previous prime is 495413. The next prime is 495433. The reversal of 495421 is 124594.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 476100 + 19321 = 690^2 + 139^2 .

It is a cyclic number.

It is not a de Polignac number, because 495421 - 2³ = 495413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (495401) 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 as a sum of consecutive naturals, namely, 247710 + 247711.

It is an arithmetic number, because the mean of its divisors is an integer number (247711).

2⁴⁹⁵⁴²¹ is an apocalyptic number.

It is an amenable number.

495421 is a deficient number, since it is larger than the sum of its proper divisors (1).

495421 is an equidigital number, since it uses as much as digits as its factorization.

495421 is an odious number, because the sum of its binary digits is odd.

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

The square root of 495421 is about 703.8614920565. The cubic root of 495421 is about 79.1270188667.

The spelling of 495421 in words is "four hundred ninety-five thousand, four hundred twenty-one".