280121275 has 24 divisors (see below), whose sum is σ = 417870080. Its totient is φ = 181971360.

The previous prime is 280121263. The next prime is 280121287. The reversal of 280121275 is 572121082.

It is an interprime number because it is at equal distance from previous prime (280121263) and next prime (280121287).

It is not a de Polignac number, because 280121275 - 2⁵ = 280121243 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38799 + ... + 45448.

Almost surely, 2^280121275 is an apocalyptic number.

280121275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

280121275 is a deficient number, since it is larger than the sum of its proper divisors (137748805).

280121275 is a wasteful number, since it uses less digits than its factorization.

280121275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84283 (or 84278 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 280121275 is about 16736.8239221186. The cubic root of 280121275 is about 654.3077004442.

The spelling of 280121275 in words is "two hundred eighty million, one hundred twenty-one thousand, two hundred seventy-five".