11404531 has 2 divisors, whose sum is σ = 11404532. Its totient is φ = 11404530.

The previous prime is 11404529. The next prime is 11404543. The reversal of 11404531 is 13540411.

11404531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (13540411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11404531 - 2¹ = 11404529 is a prime.

It is a super-2 number, since 2×11404531² = 260126654659922, which contains 22 as substring.

Together with 11404529, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 11404499 and 11404508.

It is not a weakly prime, because it can be changed into another prime (11404231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5702265 + 5702266.

It is an arithmetic number, because the mean of its divisors is an integer number (5702266).

Almost surely, 2^11404531 is an apocalyptic number.

11404531 is a deficient number, since it is larger than the sum of its proper divisors (1).

11404531 is an equidigital number, since it uses as much as digits as its factorization.

11404531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 11404531 is about 3377.0595197598. The cubic root of 11404531 is about 225.0915249046.

Adding to 11404531 its reverse (13540411), we get a palindrome (24944942).

It can be divided in two parts, 11404 and 531, that added together give a triangular number (11935 = T₁₅₄).

The spelling of 11404531 in words is "eleven million, four hundred four thousand, five hundred thirty-one".