16012501 has 2 divisors, whose sum is σ = 16012502. Its totient is φ = 16012500.

The previous prime is 16012499. The next prime is 16012511. The reversal of 16012501 is 10521061.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13912900 + 2099601 = 3730^2 + 1449^2 .

It is a cyclic number.

It is not a de Polignac number, because 16012501 - 2¹ = 16012499 is a prime.

Together with 16012499, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16012511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8006250 + 8006251.

It is an arithmetic number, because the mean of its divisors is an integer number (8006251).

Almost surely, 2^16012501 is an apocalyptic number.

It is an amenable number.

16012501 is a deficient number, since it is larger than the sum of its proper divisors (1).

16012501 is an equidigital number, since it uses as much as digits as its factorization.

16012501 is an odious number, because the sum of its binary digits is odd.

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

The square root of 16012501 is about 4001.5623198946. The cubic root of 16012501 is about 252.0498190326.

Adding to 16012501 its reverse (10521061), we get a palindrome (26533562).

The spelling of 16012501 in words is "sixteen million, twelve thousand, five hundred one".