1421311 has 4 divisors (see below), whose sum is σ = 1431000. Its totient is φ = 1411624.

The previous prime is 1421309. The next prime is 1421317. The reversal of 1421311 is 1131241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1131241 = 19 ⋅59539.

It is a cyclic number.

It is not a de Polignac number, because 1421311 - 2¹ = 1421309 is a prime.

It is a Duffinian number.

It is a plaindrome in base 4 and base 16.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 1421291 and 1421300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4621 + ... + 4918.

It is an arithmetic number, because the mean of its divisors is an integer number (357750).

2^1421311 is an apocalyptic number.

1421311 is a deficient number, since it is larger than the sum of its proper divisors (9689).

1421311 is an equidigital number, since it uses as much as digits as its factorization.

1421311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9688.

The product of its digits is 24, while the sum is 13.

The square root of 1421311 is about 1192.1874852556. The cubic root of 1421311 is about 112.4336662449.

Adding to 1421311 its reverse (1131241), we get a palindrome (2552552).

The spelling of 1421311 in words is "one million, four hundred twenty-one thousand, three hundred eleven".