421957141 has 2 divisors, whose sum is σ = 421957142. Its totient is φ = 421957140.

The previous prime is 421957097. The next prime is 421957171. The reversal of 421957141 is 141759124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 418366116 + 3591025 = 20454^2 + 1895^2 .

It is a cyclic number.

It is not a de Polignac number, because 421957141 - 2⁹ = 421956629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421957097 and 421957106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421957171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210978570 + 210978571.

It is an arithmetic number, because the mean of its divisors is an integer number (210978571).

Almost surely, 2^421957141 is an apocalyptic number.

It is an amenable number.

421957141 is a deficient number, since it is larger than the sum of its proper divisors (1).

421957141 is an equidigital number, since it uses as much as digits as its factorization.

421957141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 34.

The square root of 421957141 is about 20541.5953859480. The cubic root of 421957141 is about 750.0486729893.

The spelling of 421957141 in words is "four hundred twenty-one million, nine hundred fifty-seven thousand, one hundred forty-one".