16243625 has 16 divisors (see below), whose sum is σ = 20975760. Its totient is φ = 12544000.

The previous prime is 16243609. The next prime is 16243649. The reversal of 16243625 is 52634261.

It can be written as a sum of positive squares in 8 ways, for example, as 2972176 + 13271449 = 1724^2 + 3643^2 .

It is not a de Polignac number, because 16243625 - 2⁴ = 16243609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1385 + ... + 5865.

It is an arithmetic number, because the mean of its divisors is an integer number (1310985).

Almost surely, 2^16243625 is an apocalyptic number.

It is an amenable number.

16243625 is a deficient number, since it is larger than the sum of its proper divisors (4732135).

16243625 is an equidigital number, since it uses as much as digits as its factorization.

16243625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4525 (or 4515 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

The square root of 16243625 is about 4030.3380751495. The cubic root of 16243625 is about 253.2567241037.

Adding to 16243625 its reverse (52634261), we get a palindrome (68877886).

The spelling of 16243625 in words is "sixteen million, two hundred forty-three thousand, six hundred twenty-five".