16425445 has 4 divisors (see below), whose sum is σ = 19710540. Its totient is φ = 13140352.

The previous prime is 16425439. The next prime is 16425449. The reversal of 16425445 is 54452461.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9529569 + 6895876 = 3087^2 + 2626^2 .

It is a cyclic number.

It is not a de Polignac number, because 16425445 - 2⁵ = 16425413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16425449) 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, 1642540 + ... + 1642549.

It is an arithmetic number, because the mean of its divisors is an integer number (4927635).

Almost surely, 2^16425445 is an apocalyptic number.

It is an amenable number.

16425445 is a deficient number, since it is larger than the sum of its proper divisors (3285095).

16425445 is an equidigital number, since it uses as much as digits as its factorization.

16425445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3285094.

The product of its digits is 19200, while the sum is 31.

The square root of 16425445 is about 4052.8317260898. The cubic root of 16425445 is about 254.1981476131.

The spelling of 16425445 in words is "sixteen million, four hundred twenty-five thousand, four hundred forty-five".