16054721 has 2 divisors, whose sum is σ = 16054722. Its totient is φ = 16054720.

The previous prime is 16054711. The next prime is 16054729. The reversal of 16054721 is 12745061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9859600 + 6195121 = 3140^2 + 2489^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16054721 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (16054729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8027360 + 8027361.

It is an arithmetic number, because the mean of its divisors is an integer number (8027361).

Almost surely, 2^16054721 is an apocalyptic number.

It is an amenable number.

16054721 is a deficient number, since it is larger than the sum of its proper divisors (1).

16054721 is an equidigital number, since it uses as much as digits as its factorization.

16054721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 16054721 is about 4006.8342865659. The cubic root of 16054721 is about 252.2711503582.

Adding to 16054721 its reverse (12745061), we get a palindrome (28799782).

The spelling of 16054721 in words is "sixteen million, fifty-four thousand, seven hundred twenty-one".