16402129 has 2 divisors, whose sum is σ = 16402130. Its totient is φ = 16402128.

The previous prime is 16402121. The next prime is 16402147. The reversal of 16402129 is 92120461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8850625 + 7551504 = 2975^2 + 2748^2 .

It is a cyclic number.

It is not a de Polignac number, because 16402129 - 2³ = 16402121 is a prime.

It is a pancake number, because a pancake can be divided into 16402129 parts by 5727 straight cuts.

It is equal to p_1055266 and since 16402129 and 1055266 have the same sum of digits, it is a Honaker prime.

It is a nialpdrome in base 8.

It is not a weakly prime, because it can be changed into another prime (16402121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8201064 + 8201065.

It is an arithmetic number, because the mean of its divisors is an integer number (8201065).

Almost surely, 2^16402129 is an apocalyptic number.

It is an amenable number.

16402129 is a deficient number, since it is larger than the sum of its proper divisors (1).

16402129 is an equidigital number, since it uses as much as digits as its factorization.

16402129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 16402129 is about 4049.9541972719. The cubic root of 16402129 is about 254.0778121490.

The spelling of 16402129 in words is "sixteen million, four hundred two thousand, one hundred twenty-nine".