12521854 has 4 divisors (see below), whose sum is σ = 18782784. Its totient is φ = 6260926.

The previous prime is 12521837. The next prime is 12521857. The reversal of 12521854 is 45812521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45812521 = 653 ⋅70157.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12521857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3130462 + ... + 3130465.

It is an arithmetic number, because the mean of its divisors is an integer number (4695696).

Almost surely, 2^12521854 is an apocalyptic number.

12521854 is a deficient number, since it is larger than the sum of its proper divisors (6260930).

12521854 is an equidigital number, since it uses as much as digits as its factorization.

12521854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6260929.

The product of its digits is 3200, while the sum is 28.

The square root of 12521854 is about 3538.6231785823. The cubic root of 12521854 is about 232.2146126470.

The spelling of 12521854 in words is "twelve million, five hundred twenty-one thousand, eight hundred fifty-four".