11351421 has 20 divisors (see below), whose sum is σ = 17047932. Its totient is φ = 7527168.

The previous prime is 11351419. The next prime is 11351437. The reversal of 11351421 is 12415311.

It can be written as a sum of positive squares in 2 ways, for example, as 6125625 + 5225796 = 2475^2 + 2286^2 .

It is not a de Polignac number, because 11351421 - 2¹ = 11351419 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11351394 and 11351403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11351401) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 28395 + ... + 28791.

Almost surely, 2^11351421 is an apocalyptic number.

It is an amenable number.

11351421 is a deficient number, since it is larger than the sum of its proper divisors (5696511).

11351421 is an equidigital number, since it uses as much as digits as its factorization.

11351421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762 (or 753 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 11351421 is about 3369.1869939200. The cubic root of 11351421 is about 224.7415699532.

Adding to 11351421 its reverse (12415311), we get a palindrome (23766732).

It can be divided in two parts, 1135 and 1421, that added together give a triangular number (2556 = T₇₁).

The spelling of 11351421 in words is "eleven million, three hundred fifty-one thousand, four hundred twenty-one".