12361640 has 32 divisors (see below), whose sum is σ = 28464480. Its totient is φ = 4828992.

The previous prime is 12361619. The next prime is 12361651. The reversal of 12361640 is 4616321.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1874 + ... + 5313.

It is an arithmetic number, because the mean of its divisors is an integer number (889515).

Almost surely, 2^12361640 is an apocalyptic number.

12361640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12361640 is an abundant number, since it is smaller than the sum of its proper divisors (16102840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12361640 is a wasteful number, since it uses less digits than its factorization.

12361640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7241 (or 7237 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 12361640 is about 3515.9123993638. The cubic root of 12361640 is about 231.2199824685.

Adding to 12361640 its reverse (4616321), we get a palindrome (16977961).

The spelling of 12361640 in words is "twelve million, three hundred sixty-one thousand, six hundred forty".