11390545 has 4 divisors (see below), whose sum is σ = 13668660. Its totient is φ = 9112432.

The previous prime is 11390537. The next prime is 11390551. The reversal of 11390545 is 54509311.

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 2155024 + 9235521 = 1468^2 + 3039^2 .

It is a cyclic number.

It is not a de Polignac number, because 11390545 - 2³ = 11390537 is a prime.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1139050 + ... + 1139059.

It is an arithmetic number, because the mean of its divisors is an integer number (3417165).

Almost surely, 2^11390545 is an apocalyptic number.

It is an amenable number.

11390545 is a deficient number, since it is larger than the sum of its proper divisors (2278115).

11390545 is an equidigital number, since it uses as much as digits as its factorization.

11390545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2278114.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 11390545 is about 3374.9881481273. The cubic root of 11390545 is about 224.9994732498. Note that the first 3 decimals are identical.

Adding to 11390545 its reverse (54509311), we get a palindrome (65899856).

It can be divided in two parts, 11390 and 545, that added together give a triangular number (11935 = T₁₅₄).

The spelling of 11390545 in words is "eleven million, three hundred ninety thousand, five hundred forty-five".