4245840 has 60 divisors (see below), whose sum is σ = 14261364. Its totient is φ = 1132032.

The previous prime is 4245833. The next prime is 4245847. The reversal of 4245840 is 485424.

It is an interprime number because it is at equal distance from previous prime (4245833) and next prime (4245847).

It can be written as a sum of positive squares in 2 ways, for example, as 2862864 + 1382976 = 1692^2 + 1176^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4245847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2229 + ... + 3668.

Almost surely, 2^4245840 is an apocalyptic number.

4245840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4245840 is an abundant number, since it is smaller than the sum of its proper divisors (10015524).

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

4245840 is a wasteful number, since it uses less digits than its factorization.

4245840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5916 (or 5907 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 4245840 is about 2060.5436175922. The cubic root of 4245840 is about 161.9277226732.

The spelling of 4245840 in words is "four million, two hundred forty-five thousand, eight hundred forty".