16851025 has 9 divisors (see below), whose sum is σ = 20920753. Its totient is φ = 13464400.

The previous prime is 16851007. The next prime is 16851047. The reversal of 16851025 is 52015861.

The square root of 16851025 is 4105.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2289169 + 14561856 = 1513^2 + 3816^2 .

It is not a de Polignac number, because 16851025 - 2²¹ = 14753873 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16850984 and 16851002.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 20115 + ... + 20935.

Almost surely, 2^16851025 is an apocalyptic number.

16851025 is the 4105-th square number.

16851025 is the 2053-rd centered octagonal number.

It is an amenable number.

16851025 is a deficient number, since it is larger than the sum of its proper divisors (4069728).

16851025 is an frugal number, since it uses more digits than its factorization.

16851025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652 (or 826 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 28.

The cubic root of 16851025 is about 256.3748628048.

Adding to 16851025 its reverse (52015861), we get a palindrome (68866886).

The spelling of 16851025 in words is "sixteen million, eight hundred fifty-one thousand, twenty-five".