4293921 has 4 divisors (see below), whose sum is σ = 5725232. Its totient is φ = 2862612.

The previous prime is 4293869. The next prime is 4293923. The reversal of 4293921 is 1293924.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 4293921 - 2¹⁸ = 4031777 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4293923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 715651 + ... + 715656.

It is an arithmetic number, because the mean of its divisors is an integer number (1431308).

Almost surely, 2^4293921 is an apocalyptic number.

It is an amenable number.

4293921 is a deficient number, since it is larger than the sum of its proper divisors (1431311).

4293921 is a wasteful number, since it uses less digits than its factorization.

4293921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1431310.

The product of its digits is 3888, while the sum is 30.

The square root of 4293921 is about 2072.1778398583. The cubic root of 4293921 is about 162.5366670709.

The spelling of 4293921 in words is "four million, two hundred ninety-three thousand, nine hundred twenty-one".