16297261 has 4 divisors (see below), whose sum is σ = 16465372. Its totient is φ = 16129152.

The previous prime is 16297223. The next prime is 16297313. The reversal of 16297261 is 16279261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16279261 = 389 ⋅41849.

It can be written as a sum of positive squares in 2 ways, for example, as 10017225 + 6280036 = 3165^2 + 2506^2 .

It is a cyclic number.

It is not a de Polignac number, because 16297261 - 2¹⁹ = 15772973 is a prime.

It is a super-2 number, since 2×16297261² = 531201432204242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16297201) 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, 83910 + ... + 84103.

It is an arithmetic number, because the mean of its divisors is an integer number (4116343).

Almost surely, 2^16297261 is an apocalyptic number.

It is an amenable number.

16297261 is a deficient number, since it is larger than the sum of its proper divisors (168111).

16297261 is an equidigital number, since it uses as much as digits as its factorization.

16297261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168110.

The product of its digits is 9072, while the sum is 34.

The square root of 16297261 is about 4036.9866237083. The cubic root of 16297261 is about 253.5351667552.

The spelling of 16297261 in words is "sixteen million, two hundred ninety-seven thousand, two hundred sixty-one".