12421760 has 64 divisors (see below), whose sum is σ = 32001480. Its totient is φ = 4583424.

The previous prime is 12421757. The next prime is 12421789. The reversal of 12421760 is 6712421.

It can be written as a sum of positive squares in 4 ways, for example, as 10086976 + 2334784 = 3176^2 + 1528^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent 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, 7574 + ... + 9066.

Almost surely, 2^12421760 is an apocalyptic number.

12421760 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 12421760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16000740).

12421760 is an abundant number, since it is smaller than the sum of its proper divisors (19579720).

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

12421760 is a wasteful number, since it uses less digits than its factorization.

12421760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525 (or 1513 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 12421760 is about 3524.4517304114. The cubic root of 12421760 is about 231.5942173489.

The spelling of 12421760 in words is "twelve million, four hundred twenty-one thousand, seven hundred sixty".