280994121 has 24 divisors (see below), whose sum is σ = 422163456. Its totient is φ = 179958240.

The previous prime is 280994117. The next prime is 280994123. The reversal of 280994121 is 121499082.

It is not a de Polignac number, because 280994121 - 2² = 280994117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (280994123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17656 + ... + 29558.

It is an arithmetic number, because the mean of its divisors is an integer number (17590144).

Almost surely, 2^280994121 is an apocalyptic number.

It is an amenable number.

280994121 is a deficient number, since it is larger than the sum of its proper divisors (141169335).

280994121 is a wasteful number, since it uses less digits than its factorization.

280994121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12013 (or 12010 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 280994121 is about 16762.8792574545. The cubic root of 280994121 is about 654.9865941354.

The spelling of 280994121 in words is "two hundred eighty million, nine hundred ninety-four thousand, one hundred twenty-one".