280121465 has 16 divisors (see below), whose sum is σ = 381057600. Its totient is φ = 195970752.

The previous prime is 280121449. The next prime is 280121473. The reversal of 280121465 is 564121082.

It is a cyclic number.

It is not a de Polignac number, because 280121465 - 2⁴ = 280121449 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112175 + ... + 114644.

It is an arithmetic number, because the mean of its divisors is an integer number (23816100).

Almost surely, 2^280121465 is an apocalyptic number.

It is an amenable number.

280121465 is a deficient number, since it is larger than the sum of its proper divisors (100936135).

280121465 is a wasteful number, since it uses less digits than its factorization.

280121465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226856.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 280121465 is about 16736.8295982244. The cubic root of 280121465 is about 654.3078483783.

The spelling of 280121465 in words is "two hundred eighty million, one hundred twenty-one thousand, four hundred sixty-five".