421609141 has 2 divisors, whose sum is σ = 421609142. Its totient is φ = 421609140.

The previous prime is 421609087. The next prime is 421609151. The reversal of 421609141 is 141906124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 382358916 + 39250225 = 19554^2 + 6265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421609141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421609151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210804570 + 210804571.

It is an arithmetic number, because the mean of its divisors is an integer number (210804571).

Almost surely, 2^421609141 is an apocalyptic number.

It is an amenable number.

421609141 is a deficient number, since it is larger than the sum of its proper divisors (1).

421609141 is an equidigital number, since it uses as much as digits as its factorization.

421609141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 421609141 is about 20533.1230211091. The cubic root of 421609141 is about 749.8424208200.

The spelling of 421609141 in words is "four hundred twenty-one million, six hundred nine thousand, one hundred forty-one".