4251645 has 24 divisors (see below), whose sum is σ = 7446816. Its totient is φ = 2243808.

The previous prime is 4251631. The next prime is 4251647. The reversal of 4251645 is 5461524.

It is not a de Polignac number, because 4251645 - 2⁴ = 4251629 is a prime.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4251647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4374 + ... + 5256.

It is an arithmetic number, because the mean of its divisors is an integer number (310284).

Almost surely, 2^4251645 is an apocalyptic number.

4251645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4251645 is a deficient number, since it is larger than the sum of its proper divisors (3195171).

4251645 is a wasteful number, since it uses less digits than its factorization.

4251645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001 (or 998 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 4251645 is about 2061.9517453132. The cubic root of 4251645 is about 162.0014860403.

The spelling of 4251645 in words is "four million, two hundred fifty-one thousand, six hundred forty-five".