12516001 has 4 divisors (see below), whose sum is σ = 12579732. Its totient is φ = 12452272.

The previous prime is 12515999. The next prime is 12516011. The reversal of 12516001 is 10061521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10556001 + 1960000 = 3249^2 + 1400^2 .

It is a cyclic number.

It is not a de Polignac number, because 12516001 - 2¹ = 12515999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12516011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31570 + ... + 31963.

It is an arithmetic number, because the mean of its divisors is an integer number (3144933).

Almost surely, 2^12516001 is an apocalyptic number.

It is an amenable number.

12516001 is a deficient number, since it is larger than the sum of its proper divisors (63731).

12516001 is an equidigital number, since it uses as much as digits as its factorization.

12516001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63730.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 12516001 is about 3537.7960653492. The cubic root of 12516001 is about 232.1784262072.

Adding to 12516001 its reverse (10061521), we get a palindrome (22577522).

The spelling of 12516001 in words is "twelve million, five hundred sixteen thousand, one".