11261431 has 4 divisors (see below), whose sum is σ = 11565832. Its totient is φ = 10957032.

The previous prime is 11261413. The next prime is 11261443. The reversal of 11261431 is 13416211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13416211 = 31 ⋅432781.

It is not a de Polignac number, because 11261431 - 2⁷ = 11261303 is a prime.

It is a super-2 number, since 2×11261431² = 253639656335522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11261399 and 11261408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11261461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152145 + ... + 152218.

It is an arithmetic number, because the mean of its divisors is an integer number (2891458).

Almost surely, 2^11261431 is an apocalyptic number.

11261431 is a deficient number, since it is larger than the sum of its proper divisors (304401).

11261431 is an equidigital number, since it uses as much as digits as its factorization.

11261431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304400.

The product of its digits is 144, while the sum is 19.

The square root of 11261431 is about 3355.8055664773. The cubic root of 11261431 is about 224.1461033976.

Adding to 11261431 its reverse (13416211), we get a palindrome (24677642).

The spelling of 11261431 in words is "eleven million, two hundred sixty-one thousand, four hundred thirty-one".