421451003 has 2 divisors, whose sum is σ = 421451004. Its totient is φ = 421451002.

The previous prime is 421450949. The next prime is 421451047. The reversal of 421451003 is 300154124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421451003 - 2¹⁶ = 421385467 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (421454003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210725501 + 210725502.

It is an arithmetic number, because the mean of its divisors is an integer number (210725502).

Almost surely, 2^421451003 is an apocalyptic number.

421451003 is a deficient number, since it is larger than the sum of its proper divisors (1).

421451003 is an equidigital number, since it uses as much as digits as its factorization.

421451003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 421451003 is about 20529.2718575209. The cubic root of 421451003 is about 749.7486582977.

The spelling of 421451003 in words is "four hundred twenty-one million, four hundred fifty-one thousand, three".