12650381 has 4 divisors (see below), whose sum is σ = 12669852. Its totient is φ = 12630912.

The previous prime is 12650369. The next prime is 12650413. The reversal of 12650381 is 18305621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18305621 = 877 ⋅20873.

It can be written as a sum of positive squares in 2 ways, for example, as 7474756 + 5175625 = 2734^2 + 2275^2 .

It is a cyclic number.

It is not a de Polignac number, because 12650381 - 2⁶ = 12650317 is a prime.

It is a super-2 number, since 2×12650381² = 320064278890322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12650381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12650321) 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, 8726 + ... + 10071.

It is an arithmetic number, because the mean of its divisors is an integer number (3167463).

Almost surely, 2^12650381 is an apocalyptic number.

It is an amenable number.

12650381 is a deficient number, since it is larger than the sum of its proper divisors (19471).

12650381 is an equidigital number, since it uses as much as digits as its factorization.

12650381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19470.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 12650381 is about 3556.7374094808. The cubic root of 12650381 is about 233.0064099620.

It can be divided in two parts, 12650 and 381, that added together give a palindrome (13031).

The spelling of 12650381 in words is "twelve million, six hundred fifty thousand, three hundred eighty-one".