420891041 has 2 divisors, whose sum is σ = 420891042. Its totient is φ = 420891040.

The previous prime is 420890971. The next prime is 420891043. The reversal of 420891041 is 140198024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 338008225 + 82882816 = 18385^2 + 9104^2 .

It is a cyclic number.

It is not a de Polignac number, because 420891041 - 2¹⁰ = 420890017 is a prime.

Together with 420891043, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 420890995 and 420891013.

It is not a weakly prime, because it can be changed into another prime (420891043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210445520 + 210445521.

It is an arithmetic number, because the mean of its divisors is an integer number (210445521).

Almost surely, 2^420891041 is an apocalyptic number.

It is an amenable number.

420891041 is a deficient number, since it is larger than the sum of its proper divisors (1).

420891041 is an equidigital number, since it uses as much as digits as its factorization.

420891041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 420891041 is about 20515.6291884992. The cubic root of 420891041 is about 749.4164592766.

The spelling of 420891041 in words is "four hundred twenty million, eight hundred ninety-one thousand, forty-one".