16245661 has 2 divisors, whose sum is σ = 16245662. Its totient is φ = 16245660.

The previous prime is 16245653. The next prime is 16245667. The reversal of 16245661 is 16654261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16240900 + 4761 = 4030^2 + 69^2 .

It is a cyclic number.

It is not a de Polignac number, because 16245661 - 2³ = 16245653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16245667) 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 as a sum of consecutive naturals, namely, 8122830 + 8122831.

It is an arithmetic number, because the mean of its divisors is an integer number (8122831).

Almost surely, 2^16245661 is an apocalyptic number.

It is an amenable number.

16245661 is a deficient number, since it is larger than the sum of its proper divisors (1).

16245661 is an equidigital number, since it uses as much as digits as its factorization.

16245661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 31.

The square root of 16245661 is about 4030.5906515051. The cubic root of 16245661 is about 253.2673048525.

The spelling of 16245661 in words is "sixteen million, two hundred forty-five thousand, six hundred sixty-one".