12503765 has 4 divisors (see below), whose sum is σ = 15004524. Its totient is φ = 10003008.

The previous prime is 12503759. The next prime is 12503779. The reversal of 12503765 is 56730521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56730521 = 3467 ⋅16363.

It can be written as a sum of positive squares in 2 ways, for example, as 7300804 + 5202961 = 2702^2 + 2281^2 .

It is a cyclic number.

It is not a de Polignac number, because 12503765 - 2⁴ = 12503749 is a prime.

It is a Duffinian number.

It is a Curzon 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, 1250372 + ... + 1250381.

It is an arithmetic number, because the mean of its divisors is an integer number (3751131).

Almost surely, 2^12503765 is an apocalyptic number.

It is an amenable number.

12503765 is a deficient number, since it is larger than the sum of its proper divisors (2500759).

12503765 is an equidigital number, since it uses as much as digits as its factorization.

12503765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500758.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 12503765 is about 3536.0663172514. The cubic root of 12503765 is about 232.1027401176.

The spelling of 12503765 in words is "twelve million, five hundred three thousand, seven hundred sixty-five".