421145215 has 8 divisors (see below), whose sum is σ = 505491840. Its totient is φ = 336837792.

The previous prime is 421145209. The next prime is 421145269. The reversal of 421145215 is 512541124.

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 421145215 - 2¹¹ = 421143167 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421145215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25221 + ... + 38449.

It is an arithmetic number, because the mean of its divisors is an integer number (63186480).

Almost surely, 2^421145215 is an apocalyptic number.

421145215 is a deficient number, since it is larger than the sum of its proper divisors (84346625).

421145215 is a wasteful number, since it uses less digits than its factorization.

421145215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19601.

The product of its digits is 1600, while the sum is 25.

The square root of 421145215 is about 20521.8228966142. The cubic root of 421145215 is about 749.5672852067.

Adding to 421145215 its reverse (512541124), we get a palindrome (933686339).

The spelling of 421145215 in words is "four hundred twenty-one million, one hundred forty-five thousand, two hundred fifteen".