1236621 has 8 divisors (see below), whose sum is σ = 1702144. Its totient is φ = 797760.

The previous prime is 1236611. The next prime is 1236623. The reversal of 1236621 is 1266321.

It is a happy number.

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

It is not a de Polignac number, because 1236621 - 2¹³ = 1228429 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 (1236623) 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, 6556 + ... + 6741.

It is an arithmetic number, because the mean of its divisors is an integer number (212768).

2^1236621 is an apocalyptic number.

It is an amenable number.

1236621 is a deficient number, since it is larger than the sum of its proper divisors (465523).

1236621 is a wasteful number, since it uses less digits than its factorization.

1236621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13331.

The product of its digits is 432, while the sum is 21.

The square root of 1236621 is about 1112.0346217632. The cubic root of 1236621 is about 107.3360327069.

The spelling of 1236621 in words is "one million, two hundred thirty-six thousand, six hundred twenty-one".