421451087 has 2 divisors, whose sum is σ = 421451088. Its totient is φ = 421451086.

The previous prime is 421451081. The next prime is 421451089. The reversal of 421451087 is 780154124.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421451087 - 2¹⁰ = 421450063 is a prime.

Together with 421451089, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421451081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210725543 + 210725544.

It is an arithmetic number, because the mean of its divisors is an integer number (210725544).

Almost surely, 2^421451087 is an apocalyptic number.

421451087 is a deficient number, since it is larger than the sum of its proper divisors (1).

421451087 is an equidigital number, since it uses as much as digits as its factorization.

421451087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 421451087 is about 20529.2739033800. The cubic root of 421451087 is about 749.7487081089.

The spelling of 421451087 in words is "four hundred twenty-one million, four hundred fifty-one thousand, eighty-seven".