4021243243 has 2 divisors, whose sum is σ = 4021243244. Its totient is φ = 4021243242.

The previous prime is 4021243231. The next prime is 4021243279. The reversal of 4021243243 is 3423421204.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4021243243 - 2¹⁷ = 4021112171 is a prime.

It is not a weakly prime, because it can be changed into another prime (4021243643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010621621 + 2010621622.

It is an arithmetic number, because the mean of its divisors is an integer number (2010621622).

Almost surely, 2^4021243243 is an apocalyptic number.

4021243243 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021243243 is an equidigital number, since it uses as much as digits as its factorization.

4021243243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 4021243243 is about 63413.2733976097. The cubic root of 4021243243 is about 1590.2062207636.

Adding to 4021243243 its reverse (3423421204), we get a palindrome (7444664447).

The spelling of 4021243243 in words is "four billion, twenty-one million, two hundred forty-three thousand, two hundred forty-three".