285405201 has 12 divisors (see below), whose sum is σ = 427520912. Its totient is φ = 190269972.

The previous prime is 285405199. The next prime is 285405221. The reversal of 285405201 is 102504582.

It is a happy number.

It is not a de Polignac number, because 285405201 - 2¹ = 285405199 is a prime.

It is a super-2 number, since 2×285405201² = 162912257515700802, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285405221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 587011 + ... + 587496.

Almost surely, 2^285405201 is an apocalyptic number.

It is an amenable number.

285405201 is a deficient number, since it is larger than the sum of its proper divisors (142115711).

285405201 is an equidigital number, since it uses as much as digits as its factorization.

285405201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1174522 (or 1174510 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 285405201 is about 16893.9397714092. The cubic root of 285405201 is about 658.3961677497.

Adding to 285405201 its reverse (102504582), we get a palindrome (387909783).

The spelling of 285405201 in words is "two hundred eighty-five million, four hundred five thousand, two hundred one".