4021407 has 48 divisors (see below), whose sum is σ = 6930560. Its totient is φ = 2309472.

The previous prime is 4021399. The next prime is 4021411. The reversal of 4021407 is 7041204.

It is a happy number.

It is not a de Polignac number, because 4021407 - 2³ = 4021399 is a prime.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 4021407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021417) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 59988 + ... + 60054.

Almost surely, 2^4021407 is an apocalyptic number.

4021407 is a deficient number, since it is larger than the sum of its proper divisors (2909153).

4021407 is a wasteful number, since it uses less digits than its factorization.

4021407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114 (or 102 counting only the distinct ones).

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

The square root of 4021407 is about 2005.3446087892. The cubic root of 4021407 is about 159.0227806448.

The spelling of 4021407 in words is "four million, twenty-one thousand, four hundred seven".