1122421 has 4 divisors (see below), whose sum is σ = 1126144. Its totient is φ = 1118700.

The previous prime is 1122419. The next prime is 1122427. The reversal of 1122421 is 1242211.

It is a happy number.

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: 1242211 = 773 ⋅1607.

It is a cyclic number.

It is not a de Polignac number, because 1122421 - 2¹ = 1122419 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122427) 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, 1365 + ... + 2026.

It is an arithmetic number, because the mean of its divisors is an integer number (281536).

2^1122421 is an apocalyptic number.

It is an amenable number.

1122421 is a deficient number, since it is larger than the sum of its proper divisors (3723).

1122421 is an equidigital number, since it uses as much as digits as its factorization.

1122421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3722.

The product of its digits is 32, while the sum is 13.

The square root of 1122421 is about 1059.4437219598. The cubic root of 1122421 is about 103.9246557347.

Adding to 1122421 its reverse (1242211), we get a palindrome (2364632).

The spelling of 1122421 in words is "one million, one hundred twenty-two thousand, four hundred twenty-one".