11361557 has 6 divisors (see below), whose sum is σ = 11600982. Its totient is φ = 11123112.

The previous prime is 11361529. The next prime is 11361569. The reversal of 11361557 is 75516311.

It can be written as a sum of positive squares in only one way, i.e., 10504081 + 857476 = 3241^2 + 926^2 .

It is not a de Polignac number, because 11361557 - 2²² = 7167253 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 (11361157) 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 5 ways as a sum of consecutive naturals, for example, 24308 + ... + 24770.

It is an arithmetic number, because the mean of its divisors is an integer number (1933497).

Almost surely, 2^11361557 is an apocalyptic number.

It is an amenable number.

11361557 is a deficient number, since it is larger than the sum of its proper divisors (239425).

11361557 is an frugal number, since it uses more digits than its factorization.

11361557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 979 (or 516 counting only the distinct ones).

The product of its digits is 3150, while the sum is 29.

The square root of 11361557 is about 3370.6908787369. The cubic root of 11361557 is about 224.8084427223.

Adding to 11361557 its reverse (75516311), we get a palindrome (86877868).

The spelling of 11361557 in words is "eleven million, three hundred sixty-one thousand, five hundred fifty-seven".