4145243021 has 8 divisors (see below), whose sum is σ = 4198514880. Its totient is φ = 4092050592.

The previous prime is 4145243017. The next prime is 4145243099. The reversal of 4145243021 is 1203425414.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4145243021 - 2² = 4145243017 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 (4145243821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88985 + ... + 127313.

It is an arithmetic number, because the mean of its divisors is an integer number (524814360).

Almost surely, 2^4145243021 is an apocalyptic number.

It is an amenable number.

4145243021 is a deficient number, since it is larger than the sum of its proper divisors (53271859).

4145243021 is a wasteful number, since it uses less digits than its factorization.

4145243021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39715.

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

The square root of 4145243021 is about 64383.5617296838. The cubic root of 4145243021 is about 1606.3863270445.

Adding to 4145243021 its reverse (1203425414), we get a palindrome (5348668435).

The spelling of 4145243021 in words is "four billion, one hundred forty-five million, two hundred forty-three thousand, twenty-one".