421220435 has 8 divisors (see below), whose sum is σ = 511554960. Its totient is φ = 332916064.

The previous prime is 421220417. The next prime is 421220461. The reversal of 421220435 is 534022124.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421220435 - 2¹⁰ = 421219411 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421220435.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 507080 + ... + 507909.

It is an arithmetic number, because the mean of its divisors is an integer number (63944370).

Almost surely, 2^421220435 is an apocalyptic number.

421220435 is a deficient number, since it is larger than the sum of its proper divisors (90334525).

421220435 is a wasteful number, since it uses less digits than its factorization.

421220435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015077.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 421220435 is about 20523.6554979857. The cubic root of 421220435 is about 749.6119088446.

Adding to 421220435 its reverse (534022124), we get a palindrome (955242559).

The spelling of 421220435 in words is "four hundred twenty-one million, two hundred twenty thousand, four hundred thirty-five".