12459640 has 64 divisors (see below), whose sum is σ = 30209760. Its totient is φ = 4608000.

The previous prime is 12459607. The next prime is 12459673. The reversal of 12459640 is 4695421.

It is an interprime number because it is at equal distance from previous prime (12459607) and next prime (12459673).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49515 + ... + 49765.

It is a vampire number, since it can be written as 2510 ⋅ 4964 (with its own digits).

Almost surely, 2^12459640 is an apocalyptic number.

12459640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12459640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15104880).

12459640 is an abundant number, since it is smaller than the sum of its proper divisors (17750120).

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

12459640 is a wasteful number, since it uses less digits than its factorization.

12459640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 12459640 is about 3529.8215252333. The cubic root of 12459640 is about 231.8293930011.

The spelling of 12459640 in words is "twelve million, four hundred fifty-nine thousand, six hundred forty".