285453021 has 16 divisors (see below), whose sum is σ = 435452544. Its totient is φ = 162937344.

The previous prime is 285452989. The next prime is 285453037. The reversal of 285453021 is 120354582.

It is not a de Polignac number, because 285453021 - 2⁵ = 285452989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 285453021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285458021) 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, 13561 + ... + 27473.

It is an arithmetic number, because the mean of its divisors is an integer number (27215784).

Almost surely, 2^285453021 is an apocalyptic number.

285453021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

285453021 is a deficient number, since it is larger than the sum of its proper divisors (149999523).

285453021 is a wasteful number, since it uses less digits than its factorization.

285453021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14900.

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 285453021 is about 16895.3550125471. The cubic root of 285453021 is about 658.4329373979.

The spelling of 285453021 in words is "two hundred eighty-five million, four hundred fifty-three thousand, twenty-one".