4021246291 has 2 divisors, whose sum is σ = 4021246292. Its totient is φ = 4021246290.

The previous prime is 4021246223. The next prime is 4021246379. The reversal of 4021246291 is 1926421204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4021246291 - 2¹³ = 4021238099 is a prime.

It is not a weakly prime, because it can be changed into another prime (4021240291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010623145 + 2010623146.

It is an arithmetic number, because the mean of its divisors is an integer number (2010623146).

Almost surely, 2^4021246291 is an apocalyptic number.

4021246291 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021246291 is an equidigital number, since it uses as much as digits as its factorization.

4021246291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 4021246291 is about 63413.2974304286. The cubic root of 4021246291 is about 1590.2066225421.

Adding to 4021246291 its reverse (1926421204), we get a palindrome (5947667495).

The spelling of 4021246291 in words is "four billion, twenty-one million, two hundred forty-six thousand, two hundred ninety-one".