4007421 has 32 divisors (see below), whose sum is σ = 6589440. Its totient is φ = 2386800.

The previous prime is 4007413. The next prime is 4007429. The reversal of 4007421 is 1247004.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (4007413) and next prime (4007429).

It is not a de Polignac number, because 4007421 - 2³ = 4007413 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 4007394 and 4007403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4007429) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30526 + ... + 30656.

It is an arithmetic number, because the mean of its divisors is an integer number (205920).

Almost surely, 2^4007421 is an apocalyptic number.

It is an amenable number.

4007421 is a deficient number, since it is larger than the sum of its proper divisors (2582019).

4007421 is a wasteful number, since it uses less digits than its factorization.

4007421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254 (or 248 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 4007421 is about 2001.8543903091. The cubic root of 4007421 is about 158.8382120776.

The spelling of 4007421 in words is "four million, seven thousand, four hundred twenty-one".