2180045 has 16 divisors (see below), whose sum is σ = 3014400. Its totient is φ = 1482624.

The previous prime is 2180039. The next prime is 2180051. The reversal of 2180045 is 5400812.

It is an interprime number because it is at equal distance from previous prime (2180039) and next prime (2180051).

It is a cyclic number.

It is not a de Polignac number, because 2180045 - 2⁶ = 2179981 is a prime.

It is a Curzon number.

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 2179999 and 2180026.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6809 + ... + 7121.

It is an arithmetic number, because the mean of its divisors is an integer number (188400).

2^2180045 is an apocalyptic number.

It is an amenable number.

2180045 is a deficient number, since it is larger than the sum of its proper divisors (834355).

2180045 is a wasteful number, since it uses less digits than its factorization.

2180045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 2180045 is about 1476.4975448676. The cubic root of 2180045 is about 129.6647178736.

Adding to 2180045 its reverse (5400812), we get a palindrome (7580857).

The spelling of 2180045 in words is "two million, one hundred eighty thousand, forty-five".