11561373 has 10 divisors (see below), whose sum is σ = 17270814. Its totient is φ = 7707528.

The previous prime is 11561371. The next prime is 11561423. The reversal of 11561373 is 37316511.

11561373 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 7387524 + 4173849 = 2718^2 + 2043^2 .

It is not a de Polignac number, because 11561373 - 2¹ = 11561371 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11561371) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 71286 + ... + 71447.

Almost surely, 2^11561373 is an apocalyptic number.

It is an amenable number.

11561373 is a deficient number, since it is larger than the sum of its proper divisors (5709441).

11561373 is an equidigital number, since it uses as much as digits as its factorization.

11561373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142745 (or 142736 counting only the distinct ones).

The product of its digits is 1890, while the sum is 27.

The square root of 11561373 is about 3400.2019057697. The cubic root of 11561373 is about 226.1186953186.

Adding to 11561373 its reverse (37316511), we get a palindrome (48877884).

The spelling of 11561373 in words is "eleven million, five hundred sixty-one thousand, three hundred seventy-three".