421451047 has 2 divisors, whose sum is σ = 421451048. Its totient is φ = 421451046.

The previous prime is 421451003. The next prime is 421451059. The reversal of 421451047 is 740154124.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421451047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421451087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210725523 + 210725524.

It is an arithmetic number, because the mean of its divisors is an integer number (210725524).

Almost surely, 2^421451047 is an apocalyptic number.

421451047 is a deficient number, since it is larger than the sum of its proper divisors (1).

421451047 is an equidigital number, since it uses as much as digits as its factorization.

421451047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 421451047 is about 20529.2729291614. The cubic root of 421451047 is about 749.7486843893.

The spelling of 421451047 in words is "four hundred twenty-one million, four hundred fifty-one thousand, forty-seven".