11890045 has 4 divisors (see below), whose sum is σ = 14268060. Its totient is φ = 9512032.

The previous prime is 11890031. The next prime is 11890049. The reversal of 11890045 is 54009811.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54009811 = 4139 ⋅13049.

It can be written as a sum of positive squares in 2 ways, for example, as 4691556 + 7198489 = 2166^2 + 2683^2 .

It is a cyclic number.

It is not a de Polignac number, because 11890045 - 2¹³ = 11881853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11889995 and 11890022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11890049) 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, 1189000 + ... + 1189009.

It is an arithmetic number, because the mean of its divisors is an integer number (3567015).

Almost surely, 2^11890045 is an apocalyptic number.

It is an amenable number.

11890045 is a deficient number, since it is larger than the sum of its proper divisors (2378015).

11890045 is an equidigital number, since it uses as much as digits as its factorization.

11890045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2378014.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 11890045 is about 3448.1944550736. The cubic root of 11890045 is about 228.2414403996.

Adding to 11890045 its reverse (54009811), we get a palindrome (65899856).

The spelling of 11890045 in words is "eleven million, eight hundred ninety thousand, forty-five".