16403146 has 4 divisors (see below), whose sum is σ = 24604722. Its totient is φ = 8201572.

The previous prime is 16403143. The next prime is 16403171. The reversal of 16403146 is 64130461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10208025 + 6195121 = 3195^2 + 2489^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16403146.

It is not an unprimeable number, because it can be changed into a prime (16403143) 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, 4100785 + ... + 4100788.

Almost surely, 2^16403146 is an apocalyptic number.

16403146 is a deficient number, since it is larger than the sum of its proper divisors (8201576).

16403146 is an equidigital number, since it uses as much as digits as its factorization.

16403146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8201575.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 16403146 is about 4050.0797523012. The cubic root of 16403146 is about 254.0830633331.

The spelling of 16403146 in words is "sixteen million, four hundred three thousand, one hundred forty-six".