12402765 has 24 divisors (see below), whose sum is σ = 21585408. Its totient is φ = 6588000.

The previous prime is 12402751. The next prime is 12402769. The reversal of 12402765 is 56720421.

It is not a de Polignac number, because 12402765 - 2⁹ = 12402253 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12402769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16140 + ... + 16890.

It is an arithmetic number, because the mean of its divisors is an integer number (899392).

Almost surely, 2^12402765 is an apocalyptic number.

12402765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12402765 is a deficient number, since it is larger than the sum of its proper divisors (9182643).

12402765 is a wasteful number, since it uses less digits than its factorization.

12402765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129 (or 1126 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 12402765 is about 3521.7559540661. The cubic root of 12402765 is about 231.4761080416.

It can be divided in two parts, 1240 and 2765, that added together give a triangular number (4005 = T₈₉).

The spelling of 12402765 in words is "twelve million, four hundred two thousand, seven hundred sixty-five".