421403401 has 16 divisors (see below), whose sum is σ = 449491968. Its totient is φ = 394218000.

The previous prime is 421403357. The next prime is 421403417. The reversal of 421403401 is 104304124.

It is a cyclic number.

It is not a de Polignac number, because 421403401 - 2⁹ = 421402889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421403431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231786 + ... + 233596.

It is an arithmetic number, because the mean of its divisors is an integer number (28093248).

Almost surely, 2^421403401 is an apocalyptic number.

It is an amenable number.

421403401 is a deficient number, since it is larger than the sum of its proper divisors (28088567).

421403401 is a wasteful number, since it uses less digits than its factorization.

421403401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2052.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 421403401 is about 20528.1124558494. The cubic root of 421403401 is about 749.7204297262.

Adding to 421403401 its reverse (104304124), we get a palindrome (525707525).

The spelling of 421403401 in words is "four hundred twenty-one million, four hundred three thousand, four hundred one".