1111421 has 4 divisors (see below), whose sum is σ = 1137312. Its totient is φ = 1085532.

The previous prime is 1111399. The next prime is 1111423. The reversal of 1111421 is 1241111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1241111 = 41 ⋅30271.

It is a cyclic number.

It is not a de Polignac number, because 1111421 - 2¹⁰ = 1110397 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 (1111423) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 12881 + ... + 12966.

It is an arithmetic number, because the mean of its divisors is an integer number (284328).

2^1111421 is an apocalyptic number.

It is an amenable number.

1111421 is a deficient number, since it is larger than the sum of its proper divisors (25891).

1111421 is an equidigital number, since it uses as much as digits as its factorization.

1111421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25890.

The product of its digits is 8, while the sum is 11.

The square root of 1111421 is about 1054.2395363484. The cubic root of 1111421 is about 103.5840449384.

Adding to 1111421 its reverse (1241111), we get a palindrome (2352532).

The spelling of 1111421 in words is "one million, one hundred eleven thousand, four hundred twenty-one".