1421215 has 4 divisors (see below), whose sum is σ = 1705464. Its totient is φ = 1136968.

The previous prime is 1421213. The next prime is 1421221. The reversal of 1421215 is 5121241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5121241 = 19 ⋅269539.

It is a cyclic number.

It is not a de Polignac number, because 1421215 - 2¹ = 1421213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142117 + ... + 142126.

It is an arithmetic number, because the mean of its divisors is an integer number (426366).

2^1421215 is an apocalyptic number.

1421215 is a deficient number, since it is larger than the sum of its proper divisors (284249).

1421215 is an equidigital number, since it uses as much as digits as its factorization.

1421215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284248.

The product of its digits is 80, while the sum is 16.

The square root of 1421215 is about 1192.1472224520. The cubic root of 1421215 is about 112.4311348085.

Adding to 1421215 its reverse (5121241), we get a palindrome (6542456).

The spelling of 1421215 in words is "one million, four hundred twenty-one thousand, two hundred fifteen".