4018145 has 4 divisors (see below), whose sum is σ = 4821780. Its totient is φ = 3214512.

The previous prime is 4018109. The next prime is 4018151. The reversal of 4018145 is 5418104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 839056 + 3179089 = 916^2 + 1783^2 .

It is a cyclic number.

It is not a de Polignac number, because 4018145 - 2⁶ = 4018081 is a prime.

It is a super-2 number, since 2×4018145² = 32290978482050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4018145.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 401810 + ... + 401819.

It is an arithmetic number, because the mean of its divisors is an integer number (1205445).

Almost surely, 2^4018145 is an apocalyptic number.

It is an amenable number.

4018145 is a deficient number, since it is larger than the sum of its proper divisors (803635).

4018145 is an equidigital number, since it uses as much as digits as its factorization.

4018145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803634.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 4018145 is about 2004.5311172441. The cubic root of 4018145 is about 158.9797714334.

The spelling of 4018145 in words is "four million, eighteen thousand, one hundred forty-five".