11545997 has 4 divisors (see below), whose sum is σ = 11763900. Its totient is φ = 11328096.

The previous prime is 11545979. The next prime is 11545999. The reversal of 11545997 is 79954511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5621641 + 5924356 = 2371^2 + 2434^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11545997 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 (11545999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108872 + ... + 108977.

It is an arithmetic number, because the mean of its divisors is an integer number (2940975).

Almost surely, 2^11545997 is an apocalyptic number.

It is an amenable number.

11545997 is a deficient number, since it is larger than the sum of its proper divisors (217903).

11545997 is an equidigital number, since it uses as much as digits as its factorization.

11545997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217902.

The product of its digits is 56700, while the sum is 41.

The square root of 11545997 is about 3397.9401113027. The cubic root of 11545997 is about 226.0184089737.

The spelling of 11545997 in words is "eleven million, five hundred forty-five thousand, nine hundred ninety-seven".