4255640 has 16 divisors (see below), whose sum is σ = 9575280. Its totient is φ = 1702240.

The previous prime is 4255637. The next prime is 4255673. The reversal of 4255640 is 465524.

It is a super-2 number, since 2×4255640² = 36220943619200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53156 + ... + 53235.

It is an arithmetic number, because the mean of its divisors is an integer number (598455).

Almost surely, 2^4255640 is an apocalyptic number.

4255640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4255640 is an abundant number, since it is smaller than the sum of its proper divisors (5319640).

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

4255640 is a wasteful number, since it uses less digits than its factorization.

4255640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106402 (or 106398 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 4255640 is about 2062.9202602137. The cubic root of 4255640 is about 162.0522109819.

The spelling of 4255640 in words is "four million, two hundred fifty-five thousand, six hundred forty".