4002945 has 8 divisors (see below), whose sum is σ = 6404736. Its totient is φ = 2134896.

The previous prime is 4002923. The next prime is 4002949. The reversal of 4002945 is 5492004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4002945 - 2¹¹ = 4000897 is a prime.

It is a Curzon number.

4002945 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4002949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133417 + ... + 133446.

It is an arithmetic number, because the mean of its divisors is an integer number (800592).

Almost surely, 2^4002945 is an apocalyptic number.

It is an amenable number.

4002945 is a deficient number, since it is larger than the sum of its proper divisors (2401791).

4002945 is a wasteful number, since it uses less digits than its factorization.

4002945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266871.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 4002945 is about 2000.7361145338. The cubic root of 4002945 is about 158.7790531074.

Adding to 4002945 its reverse (5492004), we get a palindrome (9494949).

The spelling of 4002945 in words is "four million, two thousand, nine hundred forty-five".