4145421 has 16 divisors (see below), whose sum is σ = 6347264. Its totient is φ = 2357424.

The previous prime is 4145419. The next prime is 4145423. The reversal of 4145421 is 1245414.

It is a happy number.

4145421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (4145419) and next prime (4145423).

It is not a de Polignac number, because 4145421 - 2¹ = 4145419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4145423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6126 + ... + 6768.

It is an arithmetic number, because the mean of its divisors is an integer number (396704).

Almost surely, 2^4145421 is an apocalyptic number.

It is an amenable number.

4145421 is a deficient number, since it is larger than the sum of its proper divisors (2201843).

4145421 is a wasteful number, since it uses less digits than its factorization.

4145421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960.

The product of its digits is 640, while the sum is 21.

The square root of 4145421 is about 2036.0306972146. The cubic root of 4145421 is about 160.6409317167.

The spelling of 4145421 in words is "four million, one hundred forty-five thousand, four hundred twenty-one".