2765381 has 4 divisors (see below), whose sum is σ = 2817612. Its totient is φ = 2713152.

The previous prime is 2765369. The next prime is 2765383. The reversal of 2765381 is 1835672.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 688900 + 2076481 = 830^2 + 1441^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2765381 is a prime.

It is a super-2 number, since 2×2765381² = 15294664150322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2765383) 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, 26036 + ... + 26141.

It is an arithmetic number, because the mean of its divisors is an integer number (704403).

2^2765381 is an apocalyptic number.

It is an amenable number.

2765381 is a deficient number, since it is larger than the sum of its proper divisors (52231).

2765381 is an equidigital number, since it uses as much as digits as its factorization.

2765381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52230.

The product of its digits is 10080, while the sum is 32.

The square root of 2765381 is about 1662.9434746858. The cubic root of 2765381 is about 140.3626820784.

The spelling of 2765381 in words is "two million, seven hundred sixty-five thousand, three hundred eighty-one".