11315421 has 24 divisors (see below), whose sum is σ = 18640440. Its totient is φ = 6552576.

The previous prime is 11315401. The next prime is 11315441. The reversal of 11315421 is 12451311.

It is an interprime number because it is at equal distance from previous prime (11315401) and next prime (11315441).

It can be written as a sum of positive squares in 4 ways, for example, as 3944196 + 7371225 = 1986^2 + 2715^2 .

It is not a de Polignac number, because 11315421 - 2⁵ = 11315389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11315394 and 11315403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11315401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 856 + ... + 4833.

It is an arithmetic number, because the mean of its divisors is an integer number (776685).

Almost surely, 2^11315421 is an apocalyptic number.

It is an amenable number.

11315421 is a deficient number, since it is larger than the sum of its proper divisors (7325019).

11315421 is a wasteful number, since it uses less digits than its factorization.

11315421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5725 (or 5722 counting only the distinct ones).

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

The square root of 11315421 is about 3363.8402161815. The cubic root of 11315421 is about 224.5037358651.

Adding to 11315421 its reverse (12451311), we get a palindrome (23766732).

The spelling of 11315421 in words is "eleven million, three hundred fifteen thousand, four hundred twenty-one".