16123201 has 2 divisors, whose sum is σ = 16123202. Its totient is φ = 16123200.

The previous prime is 16123199. The next prime is 16123213. The reversal of 16123201 is 10232161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16000000 + 123201 = 4000^2 + 351^2 .

It is a cyclic number.

It is not a de Polignac number, because 16123201 - 2¹ = 16123199 is a prime.

It is a super-2 number, since 2×16123201² = 519915220972802, which contains 22 as substring.

Together with 16123199, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16123241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8061600 + 8061601.

It is an arithmetic number, because the mean of its divisors is an integer number (8061601).

Almost surely, 2^16123201 is an apocalyptic number.

It is an amenable number.

16123201 is a deficient number, since it is larger than the sum of its proper divisors (1).

16123201 is an equidigital number, since it uses as much as digits as its factorization.

16123201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 16123201 is about 4015.3705931084. The cubic root of 16123201 is about 252.6293217231.

Adding to 16123201 its reverse (10232161), we get a palindrome (26355362).

It can be divided in two parts, 16 and 123201, that multiplied together give a square (1971216 = 1404²).

The spelling of 16123201 in words is "sixteen million, one hundred twenty-three thousand, two hundred one".