4012921 has 8 divisors (see below), whose sum is σ = 4428000. Its totient is φ = 3606240.

The previous prime is 4012873. The next prime is 4012927. The reversal of 4012921 is 1292104.

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

It is not a de Polignac number, because 4012921 - 2¹⁷ = 3881849 is a prime.

It is a super-2 number, since 2×4012921² = 32207069904482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4012927) 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, 1071 + ... + 3028.

It is an arithmetic number, because the mean of its divisors is an integer number (553500).

Almost surely, 2^4012921 is an apocalyptic number.

It is an amenable number.

4012921 is a deficient number, since it is larger than the sum of its proper divisors (415079).

4012921 is a wasteful number, since it uses less digits than its factorization.

4012921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4199.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 4012921 is about 2003.2276455760. The cubic root of 4012921 is about 158.9108448929.

The spelling of 4012921 in words is "four million, twelve thousand, nine hundred twenty-one".