13751765 has 4 divisors (see below), whose sum is σ = 16502124. Its totient is φ = 11001408.

The previous prime is 13751743. The next prime is 13751783. The reversal of 13751765 is 56715731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56715731 = 191 ⋅296941.

It can be written as a sum of positive squares in 2 ways, for example, as 1522756 + 12229009 = 1234^2 + 3497^2 .

It is a cyclic number.

It is not a de Polignac number, because 13751765 - 2⁸ = 13751509 is a prime.

It is a super-2 number, since 2×13751765² = 378222081230450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1375172 + ... + 1375181.

It is an arithmetic number, because the mean of its divisors is an integer number (4125531).

Almost surely, 2^13751765 is an apocalyptic number.

It is an amenable number.

13751765 is a deficient number, since it is larger than the sum of its proper divisors (2750359).

13751765 is an equidigital number, since it uses as much as digits as its factorization.

13751765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2750358.

The product of its digits is 22050, while the sum is 35.

The square root of 13751765 is about 3708.3372284624. The cubic root of 13751765 is about 239.5812431492.

The spelling of 13751765 in words is "thirteen million, seven hundred fifty-one thousand, seven hundred sixty-five".