11554381 has 2 divisors, whose sum is σ = 11554382. Its totient is φ = 11554380.

The previous prime is 11554321. The next prime is 11554391. The reversal of 11554381 is 18345511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10432900 + 1121481 = 3230^2 + 1059^2 .

It is a cyclic number.

It is not a de Polignac number, because 11554381 - 2⁷ = 11554253 is a prime.

It is a super-2 number, since 2×11554381² = 267007440586322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11554321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5777190 + 5777191.

It is an arithmetic number, because the mean of its divisors is an integer number (5777191).

Almost surely, 2^11554381 is an apocalyptic number.

It is an amenable number.

11554381 is a deficient number, since it is larger than the sum of its proper divisors (1).

11554381 is an equidigital number, since it uses as much as digits as its factorization.

11554381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2400, while the sum is 28.

The square root of 11554381 is about 3399.1735760329. The cubic root of 11554381 is about 226.0731026730.

Adding to 11554381 its reverse (18345511), we get a palindrome (29899892).

It can be divided in two parts, 11554 and 381, that added together give a triangular number (11935 = T₁₅₄).

The spelling of 11554381 in words is "eleven million, five hundred fifty-four thousand, three hundred eighty-one".