12361520 has 40 divisors (see below), whose sum is σ = 28926720. Its totient is φ = 4912640.

The previous prime is 12361513. The next prime is 12361537. The reversal of 12361520 is 2516321.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 12361492 and 12361501.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14876 + ... + 15684.

It is an arithmetic number, because the mean of its divisors is an integer number (723168).

Almost surely, 2^12361520 is an apocalyptic number.

12361520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12361520 is an abundant number, since it is smaller than the sum of its proper divisors (16565200).

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

12361520 is a wasteful number, since it uses less digits than its factorization.

12361520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013 (or 1007 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 12361520 is about 3515.8953340508. The cubic root of 12361520 is about 231.2192342806.

Adding to 12361520 its reverse (2516321), we get a palindrome (14877841).

The spelling of 12361520 in words is "twelve million, three hundred sixty-one thousand, five hundred twenty".