11261551 has 8 divisors (see below), whose sum is σ = 12939264. Its totient is φ = 9601080.

The previous prime is 11261543. The next prime is 11261563. The reversal of 11261551 is 15516211.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11261551 - 2³ = 11261543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11261501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2875 + ... + 5548.

It is an arithmetic number, because the mean of its divisors is an integer number (1617408).

Almost surely, 2^11261551 is an apocalyptic number.

11261551 is a deficient number, since it is larger than the sum of its proper divisors (1677713).

11261551 is an equidigital number, since it uses as much as digits as its factorization.

11261551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8621.

The product of its digits is 300, while the sum is 22.

The square root of 11261551 is about 3355.8234458922. The cubic root of 11261551 is about 224.1468995497.

Adding to 11261551 its reverse (15516211), we get a palindrome (26777762).

The spelling of 11261551 in words is "eleven million, two hundred sixty-one thousand, five hundred fifty-one".