11261621 has 12 divisors (see below), whose sum is σ = 13160160. Its totient is φ = 9608760.

The previous prime is 11261611. The next prime is 11261629. The reversal of 11261621 is 12616211.

It is not a de Polignac number, because 11261621 - 2¹⁸ = 10999477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11261593 and 11261602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11261629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14870 + ... + 15608.

It is an arithmetic number, because the mean of its divisors is an integer number (1096680).

Almost surely, 2^11261621 is an apocalyptic number.

It is an amenable number.

11261621 is a deficient number, since it is larger than the sum of its proper divisors (1898539).

11261621 is an equidigital number, since it uses as much as digits as its factorization.

11261621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064 (or 1057 counting only the distinct ones).

The product of its digits is 144, while the sum is 20.

The square root of 11261621 is about 3355.8338755070. The cubic root of 11261621 is about 224.1473639692.

Adding to 11261621 its reverse (12616211), we get a palindrome (23877832).

The spelling of 11261621 in words is "eleven million, two hundred sixty-one thousand, six hundred twenty-one".