70281 has 16 divisors (see below), whose sum is σ = 110400. Its totient is φ = 44064.

The previous prime is 70271. The next prime is 70289. The reversal of 70281 is 18207.

It is not a de Polignac number, because 70281 - 2⁵ = 70249 is a prime.

It is a super-2 number, since 2×70281² = 9878837922, which contains 22 as substring.

It is a plaindrome in base 16.

It is a nialpdrome in base 5.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 70281.

It is not an unprimeable number, because it can be changed into a prime (70289) 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, 445 + ... + 581.

It is an arithmetic number, because the mean of its divisors is an integer number (6900).

2⁷⁰²⁸¹ is an apocalyptic number.

It is an amenable number.

70281 is a deficient number, since it is larger than the sum of its proper divisors (40119).

70281 is a wasteful number, since it uses less digits than its factorization.

70281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 159 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 70281 is about 265.1056393214. The cubic root of 70281 is about 41.2679260930.

Adding to 70281 its reverse (18207), we get a palindrome (88488).

It can be divided in two parts, 70 and 281, that added together give a triangular number (351 = T₂₆).

The spelling of 70281 in words is "seventy thousand, two hundred eighty-one".