280865061 has 6 divisors (see below), whose sum is σ = 405693990. Its totient is φ = 187243368.

The previous prime is 280865059. The next prime is 280865063. The reversal of 280865061 is 160568082.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (280865059) and next prime (280865063).

It can be written as a sum of positive squares in only one way, i.e., 279224100 + 1640961 = 16710^2 + 1281^2 .

It is not a de Polignac number, because 280865061 - 2¹ = 280865059 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280865063) 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, 15603606 + ... + 15603623.

It is an arithmetic number, because the mean of its divisors is an integer number (67615665).

Almost surely, 2^280865061 is an apocalyptic number.

It is an amenable number.

280865061 is a deficient number, since it is larger than the sum of its proper divisors (124828929).

280865061 is a wasteful number, since it uses less digits than its factorization.

280865061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31207235 (or 31207232 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 280865061 is about 16759.0292379959. The cubic root of 280865061 is about 654.8863007975.

The spelling of 280865061 in words is "two hundred eighty million, eight hundred sixty-five thousand, sixty-one".