16257025 has 6 divisors (see below), whose sum is σ = 20158742. Its totient is φ = 13005600.

The previous prime is 16257013. The next prime is 16257029. The reversal of 16257025 is 52075261.

It is a Cunningham number, because it is equal to 4032²+1.

It can be written as a sum of positive squares in 3 ways, for example, as 1 + 16257024 = 1^2 + 4032^2 .

It is not a de Polignac number, because 16257025 - 2¹¹ = 16254977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16256984 and 16257002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16257029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 325116 + ... + 325165.

It is a Proth number, since it is equal to 3969 ⋅ 2¹² + 1 and 3969 < 2¹².

Almost surely, 2^16257025 is an apocalyptic number.

It is an amenable number.

16257025 is a deficient number, since it is larger than the sum of its proper divisors (3901717).

16257025 is an equidigital number, since it uses as much as digits as its factorization.

16257025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650291 (or 650286 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 16257025 is about 4032.0001240079. Note that the first 3 decimals coincide. The cubic root of 16257025 is about 253.3263454136.

The spelling of 16257025 in words is "sixteen million, two hundred fifty-seven thousand, twenty-five".