280112641 has 4 divisors (see below), whose sum is σ = 280185172. Its totient is φ = 280040112.

The previous prime is 280112617. The next prime is 280112647. The reversal of 280112641 is 146211082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 146211082 = 2 ⋅73105541.

It can be written as a sum of positive squares in 2 ways, for example, as 140778225 + 139334416 = 11865^2 + 11804^2 .

It is a cyclic number.

It is not a de Polignac number, because 280112641 - 2²⁵ = 246558209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280112647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30126 + ... + 38311.

It is an arithmetic number, because the mean of its divisors is an integer number (70046293).

Almost surely, 2^280112641 is an apocalyptic number.

It is an amenable number.

280112641 is a deficient number, since it is larger than the sum of its proper divisors (72531).

280112641 is an equidigital number, since it uses as much as digits as its factorization.

280112641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72530.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 280112641 is about 16736.5659858885. The cubic root of 280112641 is about 654.3009779383.

The spelling of 280112641 in words is "two hundred eighty million, one hundred twelve thousand, six hundred forty-one".