4280921 has 8 divisors (see below), whose sum is σ = 4488000. Its totient is φ = 4075632.

The previous prime is 4280917. The next prime is 4280929. The reversal of 4280921 is 1290824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4280921 - 2² = 4280917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4280929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8330 + ... + 8828.

It is an arithmetic number, because the mean of its divisors is an integer number (561000).

Almost surely, 2^4280921 is an apocalyptic number.

It is an amenable number.

4280921 is a deficient number, since it is larger than the sum of its proper divisors (207079).

4280921 is a wasteful number, since it uses less digits than its factorization.

4280921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 4280921 is about 2069.0386656609. The cubic root of 4280921 is about 162.3724727260.

The spelling of 4280921 in words is "four million, two hundred eighty thousand, nine hundred twenty-one".