421548403 has 2 divisors, whose sum is σ = 421548404. Its totient is φ = 421548402.

The previous prime is 421548397. The next prime is 421548419. The reversal of 421548403 is 304845124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421548403 - 2¹⁷ = 421417331 is a prime.

It is not a weakly prime, because it can be changed into another prime (421548703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210774201 + 210774202.

It is an arithmetic number, because the mean of its divisors is an integer number (210774202).

Almost surely, 2^421548403 is an apocalyptic number.

421548403 is a deficient number, since it is larger than the sum of its proper divisors (1).

421548403 is an equidigital number, since it uses as much as digits as its factorization.

421548403 is an evil number, because the sum of its binary digits is even.

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

The square root of 421548403 is about 20531.6439429482. The cubic root of 421548403 is about 749.8064110724.

The spelling of 421548403 in words is "four hundred twenty-one million, five hundred forty-eight thousand, four hundred three".