281634 has 16 divisors (see below), whose sum is σ = 571872. Its totient is φ = 92448.

The previous prime is 281627. The next prime is 281641. The reversal of 281634 is 436182.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (281627) and next prime (281641).

It is an unprimeable number.

281634 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117 + ... + 759.

It is an arithmetic number, because the mean of its divisors is an integer number (35742).

2²⁸¹⁶³⁴ is an apocalyptic number.

281634 is an abundant number, since it is smaller than the sum of its proper divisors (290238).

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

281634 is a wasteful number, since it uses less digits than its factorization.

281634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721.

The product of its digits is 1152, while the sum is 24.

The square root of 281634 is about 530.6920010703. The cubic root of 281634 is about 65.5483395081.

It can be divided in two parts, 2816 and 34, that added together give a triangular number (2850 = T₇₅).

The spelling of 281634 in words is "two hundred eighty-one thousand, six hundred thirty-four".