421446451 has 2 divisors, whose sum is σ = 421446452. Its totient is φ = 421446450.

The previous prime is 421446449. The next prime is 421446461. The reversal of 421446451 is 154644124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421446451 - 2¹ = 421446449 is a prime.

It is a super-2 number, since 2×421446451² = 355234222120990802, which contains 22 as substring.

Together with 421446449, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (421446461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210723225 + 210723226.

It is an arithmetic number, because the mean of its divisors is an integer number (210723226).

Almost surely, 2^421446451 is an apocalyptic number.

421446451 is a deficient number, since it is larger than the sum of its proper divisors (1).

421446451 is an equidigital number, since it uses as much as digits as its factorization.

421446451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15360, while the sum is 31.

The square root of 421446451 is about 20529.1609911365. The cubic root of 421446451 is about 749.7459589976.

The spelling of 421446451 in words is "four hundred twenty-one million, four hundred forty-six thousand, four hundred fifty-one".