1122621 has 8 divisors (see below), whose sum is σ = 1533504. Its totient is φ = 730080.

The previous prime is 1122599. The next prime is 1122623. The reversal of 1122621 is 1262211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1122621 - 2¹¹ = 1120573 is a prime.

1122621 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1122621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4441 + ... + 4686.

It is an arithmetic number, because the mean of its divisors is an integer number (191688).

2^1122621 is an apocalyptic number.

It is an amenable number.

1122621 is a deficient number, since it is larger than the sum of its proper divisors (410883).

1122621 is an equidigital number, since it uses as much as digits as its factorization.

1122621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9171.

The product of its digits is 48, while the sum is 15.

The square root of 1122621 is about 1059.5381069126. The cubic root of 1122621 is about 103.9308280167.

Adding to 1122621 its reverse (1262211), we get a palindrome (2384832).

The spelling of 1122621 in words is "one million, one hundred twenty-two thousand, six hundred twenty-one".