4094721 has 6 divisors (see below), whose sum is σ = 5914610. Its totient is φ = 2729808.

The previous prime is 4094719. The next prime is 4094731. The reversal of 4094721 is 1274904.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3686400 + 408321 = 1920^2 + 639^2 .

It is not a de Polignac number, because 4094721 - 2¹ = 4094719 is a prime.

It is a Duffinian number.

It is a Curzon number.

4094721 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4094731) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 227476 + ... + 227493.

Almost surely, 2^4094721 is an apocalyptic number.

It is an amenable number.

4094721 is a deficient number, since it is larger than the sum of its proper divisors (1819889).

4094721 is a wasteful number, since it uses less digits than its factorization.

4094721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454975 (or 454972 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 4094721 is about 2023.5416971241. The cubic root of 4094721 is about 159.9833446205.

The spelling of 4094721 in words is "four million, ninety-four thousand, seven hundred twenty-one".