16849121 has 2 divisors, whose sum is σ = 16849122. Its totient is φ = 16849120.

The previous prime is 16849117. The next prime is 16849127. The reversal of 16849121 is 12194861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10010896 + 6838225 = 3164^2 + 2615^2 .

It is a cyclic number.

It is not a de Polignac number, because 16849121 - 2² = 16849117 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16849127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8424560 + 8424561.

It is an arithmetic number, because the mean of its divisors is an integer number (8424561).

Almost surely, 2^16849121 is an apocalyptic number.

It is an amenable number.

16849121 is a deficient number, since it is larger than the sum of its proper divisors (1).

16849121 is an equidigital number, since it uses as much as digits as its factorization.

16849121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 32.

The square root of 16849121 is about 4104.7680811466. The cubic root of 16849121 is about 256.3652064956.

The spelling of 16849121 in words is "sixteen million, eight hundred forty-nine thousand, one hundred twenty-one".