11720045 has 8 divisors (see below), whose sum is σ = 14242560. Its totient is φ = 9257040.

The previous prime is 11720039. The next prime is 11720047. The reversal of 11720045 is 54002711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11720045 - 2⁴ = 11720029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11719999 and 11720026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11720047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14441 + ... + 15230.

It is an arithmetic number, because the mean of its divisors is an integer number (1780320).

Almost surely, 2^11720045 is an apocalyptic number.

It is an amenable number.

11720045 is a deficient number, since it is larger than the sum of its proper divisors (2522515).

11720045 is an equidigital number, since it uses as much as digits as its factorization.

11720045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29755.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 11720045 is about 3423.4551260386. The cubic root of 11720045 is about 227.1484406267.

Adding to 11720045 its reverse (54002711), we get a palindrome (65722756).

The spelling of 11720045 in words is "eleven million, seven hundred twenty thousand, forty-five".