421402535 has 4 divisors (see below), whose sum is σ = 505683048. Its totient is φ = 337122024.

The previous prime is 421402519. The next prime is 421402549. The reversal of 421402535 is 535204124.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421402535 - 2⁴ = 421402519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42140249 + ... + 42140258.

It is an arithmetic number, because the mean of its divisors is an integer number (126420762).

Almost surely, 2^421402535 is an apocalyptic number.

421402535 is a deficient number, since it is larger than the sum of its proper divisors (84280513).

421402535 is an equidigital number, since it uses as much as digits as its factorization.

421402535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84280512.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 421402535 is about 20528.0913628131. The cubic root of 421402535 is about 749.7199161578.

Adding to 421402535 its reverse (535204124), we get a palindrome (956606659).

The spelling of 421402535 in words is "four hundred twenty-one million, four hundred two thousand, five hundred thirty-five".