12521334 has 64 divisors (see below), whose sum is σ = 30228480. Its totient is φ = 3382560.

The previous prime is 12521329. The next prime is 12521339. The reversal of 12521334 is 43312521.

It is an interprime number because it is at equal distance from previous prime (12521329) and next prime (12521339).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12521334.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12521339) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76737 + ... + 76899.

It is an arithmetic number, because the mean of its divisors is an integer number (472320).

Almost surely, 2^12521334 is an apocalyptic number.

12521334 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12521334, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15114240).

12521334 is an abundant number, since it is smaller than the sum of its proper divisors (17707146).

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

12521334 is a wasteful number, since it uses less digits than its factorization.

12521334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265.

The product of its digits is 720, while the sum is 21.

The square root of 12521334 is about 3538.5497029150. The cubic root of 12521334 is about 232.2113981797.

Adding to 12521334 its reverse (43312521), we get a palindrome (55833855).

The spelling of 12521334 in words is "twelve million, five hundred twenty-one thousand, three hundred thirty-four".