12349520 has 20 divisors (see below), whose sum is σ = 28712820. Its totient is φ = 4939776.

The previous prime is 12349489. The next prime is 12349523. The reversal of 12349520 is 2594321.

It can be written as a sum of positive squares in 2 ways, for example, as 4032064 + 8317456 = 2008^2 + 2884^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 12349520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12349523) 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, 77105 + ... + 77264.

It is an arithmetic number, because the mean of its divisors is an integer number (1435641).

Almost surely, 2^12349520 is an apocalyptic number.

12349520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12349520 is an abundant number, since it is smaller than the sum of its proper divisors (16363300).

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

12349520 is a wasteful number, since it uses less digits than its factorization.

12349520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154382 (or 154376 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 12349520 is about 3514.1883842503. The cubic root of 12349520 is about 231.1443910271.

The spelling of 12349520 in words is "twelve million, three hundred forty-nine thousand, five hundred twenty".