4145023421 has 16 divisors (see below), whose sum is σ = 5187058560. Its totient is φ = 3217865280.

The previous prime is 4145023409. The next prime is 4145023529. The reversal of 4145023421 is 1243205414.

4145023421 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4145023421 - 2¹⁰ = 4145022397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4145026421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79346 + ... + 120771.

It is an arithmetic number, because the mean of its divisors is an integer number (324191160).

Almost surely, 2^4145023421 is an apocalyptic number.

It is an amenable number.

4145023421 is a deficient number, since it is larger than the sum of its proper divisors (1042035139).

4145023421 is a wasteful number, since it uses less digits than its factorization.

4145023421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200404.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 4145023421 is about 64381.8563028436. The cubic root of 4145023421 is about 1606.3579596954.

Adding to 4145023421 its reverse (1243205414), we get a palindrome (5388228835).

The spelling of 4145023421 in words is "four billion, one hundred forty-five million, twenty-three thousand, four hundred twenty-one".