421223415 has 32 divisors (see below), whose sum is σ = 683601600. Its totient is φ = 221460480.

The previous prime is 421223371. The next prime is 421223441. The reversal of 421223415 is 514322124.

It is not a de Polignac number, because 421223415 - 2²⁴ = 404446199 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 393501 + ... + 394569.

It is an arithmetic number, because the mean of its divisors is an integer number (21362550).

Almost surely, 2^421223415 is an apocalyptic number.

421223415 is a deficient number, since it is larger than the sum of its proper divisors (262378185).

421223415 is a wasteful number, since it uses less digits than its factorization.

421223415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427.

The product of its digits is 1920, while the sum is 24.

The square root of 421223415 is about 20523.7280970101. The cubic root of 421223415 is about 749.6136765954.

Adding to 421223415 its reverse (514322124), we get a palindrome (935545539).

The spelling of 421223415 in words is "four hundred twenty-one million, two hundred twenty-three thousand, four hundred fifteen".