12361945 has 4 divisors (see below), whose sum is σ = 14834340. Its totient is φ = 9889552.

The previous prime is 12361933. The next prime is 12361949. The reversal of 12361945 is 54916321.

12361945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 9024016 + 3337929 = 3004^2 + 1827^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12361945 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12361949) 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, 1236190 + ... + 1236199.

It is an arithmetic number, because the mean of its divisors is an integer number (3708585).

Almost surely, 2^12361945 is an apocalyptic number.

It is an amenable number.

12361945 is a deficient number, since it is larger than the sum of its proper divisors (2472395).

12361945 is an equidigital number, since it uses as much as digits as its factorization.

12361945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2472394.

The product of its digits is 6480, while the sum is 31.

The square root of 12361945 is about 3515.9557733282. The cubic root of 12361945 is about 231.2218840909.

The spelling of 12361945 in words is "twelve million, three hundred sixty-one thousand, nine hundred forty-five".