455494821 has 16 divisors (see below), whose sum is σ = 644318784. Its totient is φ = 285237504.

The previous prime is 455494807. The next prime is 455494841. The reversal of 455494821 is 128494554.

It is not a de Polignac number, because 455494821 - 2⁶ = 455494757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (455494801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18135 + ... + 35211.

It is an arithmetic number, because the mean of its divisors is an integer number (40269924).

Almost surely, 2^455494821 is an apocalyptic number.

It is an amenable number.

455494821 is a deficient number, since it is larger than the sum of its proper divisors (188823963).

455494821 is a wasteful number, since it uses less digits than its factorization.

455494821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17620.

The product of its digits is 230400, while the sum is 42.

The square root of 455494821 is about 21342.3246390828. The cubic root of 455494821 is about 769.4158840992.

The spelling of 455494821 in words is "four hundred fifty-five million, four hundred ninety-four thousand, eight hundred twenty-one".