281405106 has 12 divisors (see below), whose sum is σ = 609711102. Its totient is φ = 93801696.

The previous prime is 281405101. The next prime is 281405123. The reversal of 281405106 is 601504182.

281405106 is a `hidden beast` number, since 2 + 8 + 140 + 510 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 215649225 + 65755881 = 14685^2 + 8109^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 281405106.

It is not an unprimeable number, because it can be changed into a prime (281405101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7816791 + ... + 7816826.

Almost surely, 2^281405106 is an apocalyptic number.

281405106 is an abundant number, since it is smaller than the sum of its proper divisors (328305996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

281405106 is a wasteful number, since it uses less digits than its factorization.

281405106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15633625 (or 15633622 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 281405106 is about 16775.1335613163. The cubic root of 281405106 is about 655.3057687040.

Adding to 281405106 its reverse (601504182), we get a palindrome (882909288).

The spelling of 281405106 in words is "two hundred eighty-one million, four hundred five thousand, one hundred six".