4020426461 has 2 divisors, whose sum is σ = 4020426462. Its totient is φ = 4020426460.

The previous prime is 4020426433. The next prime is 4020426463. The reversal of 4020426461 is 1646240204.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4020320836 + 105625 = 63406^2 + 325^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4020426461 is a prime.

Together with 4020426463, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4020426463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010213230 + 2010213231.

It is an arithmetic number, because the mean of its divisors is an integer number (2010213231).

Almost surely, 2^4020426461 is an apocalyptic number.

It is an amenable number.

4020426461 is a deficient number, since it is larger than the sum of its proper divisors (1).

4020426461 is an equidigital number, since it uses as much as digits as its factorization.

4020426461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 4020426461 is about 63406.8329204353. The cubic root of 4020426461 is about 1590.0985476148.

Adding to 4020426461 its reverse (1646240204), we get a palindrome (5666666665).

The spelling of 4020426461 in words is "four billion, twenty million, four hundred twenty-six thousand, four hundred sixty-one".