4281921 has 12 divisors (see below), whose sum is σ = 7068672. Its totient is φ = 2446776.

The previous prime is 4281913. The next prime is 4281931. The reversal of 4281921 is 1291824.

It is not a de Polignac number, because 4281921 - 2³ = 4281913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4281911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33921 + ... + 34046.

It is an arithmetic number, because the mean of its divisors is an integer number (589056).

Almost surely, 2^4281921 is an apocalyptic number.

It is an amenable number.

4281921 is a deficient number, since it is larger than the sum of its proper divisors (2786751).

4281921 is a wasteful number, since it uses less digits than its factorization.

4281921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67980 (or 67977 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 4281921 is about 2069.2803096729. The cubic root of 4281921 is about 162.3851148522.

The spelling of 4281921 in words is "four million, two hundred eighty-one thousand, nine hundred twenty-one".