421276447 has 2 divisors, whose sum is σ = 421276448. Its totient is φ = 421276446.

The previous prime is 421276421. The next prime is 421276469. The reversal of 421276447 is 744672124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421276447 - 2⁷ = 421276319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421276477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210638223 + 210638224.

It is an arithmetic number, because the mean of its divisors is an integer number (210638224).

Almost surely, 2^421276447 is an apocalyptic number.

421276447 is a deficient number, since it is larger than the sum of its proper divisors (1).

421276447 is an equidigital number, since it uses as much as digits as its factorization.

421276447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75264, while the sum is 37.

The square root of 421276447 is about 20525.0200243508. The cubic root of 421276447 is about 749.6451340459.

The spelling of 421276447 in words is "four hundred twenty-one million, two hundred seventy-six thousand, four hundred forty-seven".