421181461 has 2 divisors, whose sum is σ = 421181462. Its totient is φ = 421181460.

The previous prime is 421181447. The next prime is 421181473. The reversal of 421181461 is 164181124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 421029361 + 152100 = 20519^2 + 390^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421181461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421181441) 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, 210590730 + 210590731.

It is an arithmetic number, because the mean of its divisors is an integer number (210590731).

Almost surely, 2^421181461 is an apocalyptic number.

It is an amenable number.

421181461 is a deficient number, since it is larger than the sum of its proper divisors (1).

421181461 is an equidigital number, since it uses as much as digits as its factorization.

421181461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536, while the sum is 28.

The square root of 421181461 is about 20522.7059862972. The cubic root of 421181461 is about 749.5887885073.

The spelling of 421181461 in words is "four hundred twenty-one million, one hundred eighty-one thousand, four hundred sixty-one".