16345261 has 2 divisors, whose sum is σ = 16345262. Its totient is φ = 16345260.

The previous prime is 16345229. The next prime is 16345267. The reversal of 16345261 is 16254361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14402025 + 1943236 = 3795^2 + 1394^2 .

It is an emirp because it is prime and its reverse (16254361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16345261 - 2⁵ = 16345229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16345267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8172630 + 8172631.

It is an arithmetic number, because the mean of its divisors is an integer number (8172631).

Almost surely, 2^16345261 is an apocalyptic number.

It is an amenable number.

16345261 is a deficient number, since it is larger than the sum of its proper divisors (1).

16345261 is an equidigital number, since it uses as much as digits as its factorization.

16345261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 28.

The square root of 16345261 is about 4042.9272810675. The cubic root of 16345261 is about 253.7838334852.

The spelling of 16345261 in words is "sixteen million, three hundred forty-five thousand, two hundred sixty-one".