1226621 has 8 divisors (see below), whose sum is σ = 1408800. Its totient is φ = 1056240.

The previous prime is 1226611. The next prime is 1226623. The reversal of 1226621 is 1266221.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1226621 - 2⁶ = 1226557 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1226593 and 1226602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226623) 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, 2726 + ... + 3143.

It is an arithmetic number, because the mean of its divisors is an integer number (176100).

2^1226621 is an apocalyptic number.

1226621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1226621 is a deficient number, since it is larger than the sum of its proper divisors (182179).

1226621 is a wasteful number, since it uses less digits than its factorization.

1226621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5899.

The product of its digits is 288, while the sum is 20.

The square root of 1226621 is about 1107.5292321199. The cubic root of 1226621 is about 107.0459231646.

It can be divided in two parts, 1 and 226621, that added together give a palindrome (226622).

The spelling of 1226621 in words is "one million, two hundred twenty-six thousand, six hundred twenty-one".