4251840 has 112 divisors (see below), whose sum is σ = 13947648. Its totient is φ = 1096704.

The previous prime is 4251829. The next prime is 4251847. The reversal of 4251840 is 481524.

4251840 is nontrivially palindromic in base 7.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 4251840.

It is not an unprimeable number, because it can be changed into a prime (4251847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41229 + ... + 41331.

Almost surely, 2^4251840 is an apocalyptic number.

4251840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4251840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6973824).

4251840 is an abundant number, since it is smaller than the sum of its proper divisors (9695808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4251840 is a wasteful number, since it uses less digits than its factorization.

4251840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 4251840 is about 2061.9990300677. Note that the first 3 decimals coincide. The cubic root of 4251840 is about 162.0039627136.

The spelling of 4251840 in words is "four million, two hundred fifty-one thousand, eight hundred forty".