4145890 has 24 divisors (see below), whose sum is σ = 8682012. Its totient is φ = 1421280.

The previous prime is 4145873. The next prime is 4145891. The reversal of 4145890 is 985414.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4092529 + 53361 = 2023^2 + 231^2 .

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (4145891) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3741 + ... + 4720.

Almost surely, 2^4145890 is an apocalyptic number.

4145890 is an abundant number, since it is smaller than the sum of its proper divisors (4536122).

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

4145890 is a wasteful number, since it uses less digits than its factorization.

4145890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8482 (or 8475 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 4145890 is about 2036.1458690379. The cubic root of 4145890 is about 160.6469896263.

The spelling of 4145890 in words is "four million, one hundred forty-five thousand, eight hundred ninety".