4065140 has 24 divisors (see below), whose sum is σ = 8574720. Its totient is φ = 1618848.

The previous prime is 4065137. The next prime is 4065157. The reversal of 4065140 is 415604.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8549 + ... + 9011.

It is an arithmetic number, because the mean of its divisors is an integer number (357280).

Almost surely, 2^4065140 is an apocalyptic number.

It is an amenable number.

4065140 is an abundant number, since it is smaller than the sum of its proper divisors (4509580).

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

4065140 is a wasteful number, since it uses less digits than its factorization.

4065140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911 (or 909 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 4065140 is about 2016.2192341112. The cubic root of 4065140 is about 159.5971637028.

The spelling of 4065140 in words is "four million, sixty-five thousand, one hundred forty".