4279921 has 8 divisors (see below), whose sum is σ = 4557600. Its totient is φ = 4007520.

The previous prime is 4279897. The next prime is 4279939. The reversal of 4279921 is 1299724.

It is a happy number.

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 4279921 - 2⁵ = 4279889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4279981) 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, 426 + ... + 2956.

It is an arithmetic number, because the mean of its divisors is an integer number (569700).

Almost surely, 2^4279921 is an apocalyptic number.

It is an amenable number.

4279921 is a deficient number, since it is larger than the sum of its proper divisors (277679).

4279921 is a wasteful number, since it uses less digits than its factorization.

4279921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2639.

The product of its digits is 9072, while the sum is 34.

The square root of 4279921 is about 2068.7969934240. The cubic root of 4279921 is about 162.3598286308.

The spelling of 4279921 in words is "four million, two hundred seventy-nine thousand, nine hundred twenty-one".