11420545 has 4 divisors (see below), whose sum is σ = 13704660. Its totient is φ = 9136432.

The previous prime is 11420543. The next prime is 11420567. The reversal of 11420545 is 54502411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54502411 = 599 ⋅90989.

It can be written as a sum of positive squares in 2 ways, for example, as 7436529 + 3984016 = 2727^2 + 1996^2 .

It is a cyclic number.

It is not a de Polignac number, because 11420545 - 2¹ = 11420543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11420543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1142050 + ... + 1142059.

It is an arithmetic number, because the mean of its divisors is an integer number (3426165).

Almost surely, 2^11420545 is an apocalyptic number.

It is an amenable number.

11420545 is a deficient number, since it is larger than the sum of its proper divisors (2284115).

11420545 is an equidigital number, since it uses as much as digits as its factorization.

11420545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2284114.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 11420545 is about 3379.4296856126. The cubic root of 11420545 is about 225.1968318749.

Adding to 11420545 its reverse (54502411), we get a palindrome (65922956).

The spelling of 11420545 in words is "eleven million, four hundred twenty thousand, five hundred forty-five".