2123765 has 8 divisors (see below), whose sum is σ = 2912640. Its totient is φ = 1456272.

The previous prime is 2123761. The next prime is 2123767. The reversal of 2123765 is 5673212.

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

It is a cyclic number.

It is not a de Polignac number, because 2123765 - 2² = 2123761 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123761) 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, 30305 + ... + 30374.

It is an arithmetic number, because the mean of its divisors is an integer number (364080).

2^2123765 is an apocalyptic number.

It is an amenable number.

2123765 is a deficient number, since it is larger than the sum of its proper divisors (788875).

2123765 is an equidigital number, since it uses as much as digits as its factorization.

2123765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60691.

The product of its digits is 2520, while the sum is 26.

The square root of 2123765 is about 1457.3143106413. The cubic root of 2123765 is about 128.5391685671.

Adding to 2123765 its reverse (5673212), we get a palindrome (7796977).

The spelling of 2123765 in words is "two million, one hundred twenty-three thousand, seven hundred sixty-five".