16749425 has 54 divisors (see below), whose sum is σ = 26791254. Its totient is φ = 10348800.

The previous prime is 16749413. The next prime is 16749427. The reversal of 16749425 is 52494761.

It can be written as a sum of positive squares in 3 ways, for example, as 94864 + 16654561 = 308^2 + 4081^2 .

It is not a de Polignac number, because 16749425 - 2⁸ = 16749169 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16749427) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 148169 + ... + 148281.

Almost surely, 2^16749425 is an apocalyptic number.

It is an amenable number.

16749425 is a deficient number, since it is larger than the sum of its proper divisors (10041829).

16749425 is a wasteful number, since it uses less digits than its factorization.

16749425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159 (or 136 counting only the distinct ones).

The product of its digits is 60480, while the sum is 38.

The square root of 16749425 is about 4092.6061379028. The cubic root of 16749425 is about 255.8585695437.

The spelling of 16749425 in words is "sixteen million, seven hundred forty-nine thousand, four hundred twenty-five".