12521453 has 8 divisors (see below), whose sum is σ = 14932608. Its totient is φ = 10265904.

The previous prime is 12521447. The next prime is 12521473. The reversal of 12521453 is 35412521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12521453 - 2¹⁴ = 12505069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12521473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38726 + ... + 39047.

It is an arithmetic number, because the mean of its divisors is an integer number (1866576).

Almost surely, 2^12521453 is an apocalyptic number.

It is an amenable number.

12521453 is a deficient number, since it is larger than the sum of its proper divisors (2411155).

12521453 is an equidigital number, since it uses as much as digits as its factorization.

12521453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77803.

The product of its digits is 1200, while the sum is 23.

The square root of 12521453 is about 3538.5665176735. The cubic root of 12521453 is about 232.2121338061.

Adding to 12521453 its reverse (35412521), we get a palindrome (47933974).

The spelling of 12521453 in words is "twelve million, five hundred twenty-one thousand, four hundred fifty-three".