421436461 has 2 divisors, whose sum is σ = 421436462. Its totient is φ = 421436460.

The previous prime is 421436453. The next prime is 421436467. The reversal of 421436461 is 164634124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222457225 + 198979236 = 14915^2 + 14106^2 .

It is a cyclic number.

It is not a de Polignac number, because 421436461 - 2³ = 421436453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421436467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210718230 + 210718231.

It is an arithmetic number, because the mean of its divisors is an integer number (210718231).

Almost surely, 2^421436461 is an apocalyptic number.

It is an amenable number.

421436461 is a deficient number, since it is larger than the sum of its proper divisors (1).

421436461 is an equidigital number, since it uses as much as digits as its factorization.

421436461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 31.

The square root of 421436461 is about 20528.9176772669. The cubic root of 421436461 is about 749.7400349383.

The spelling of 421436461 in words is "four hundred twenty-one million, four hundred thirty-six thousand, four hundred sixty-one".