4005242 has 4 divisors (see below), whose sum is σ = 6007866. Its totient is φ = 2002620.

The previous prime is 4005241. The next prime is 4005271. The reversal of 4005242 is 2425004.

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

It can be written as a sum of positive squares in only one way, i.e., 3568321 + 436921 = 1889^2 + 661^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 4005242.

It is not an unprimeable number, because it can be changed into a prime (4005241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001309 + ... + 1001312.

Almost surely, 2^4005242 is an apocalyptic number.

4005242 is a deficient number, since it is larger than the sum of its proper divisors (2002624).

4005242 is a wasteful number, since it uses less digits than its factorization.

4005242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2002623.

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 4005242 is about 2001.3100709285. The cubic root of 4005242 is about 158.8094178968.

The spelling of 4005242 in words is "four million, five thousand, two hundred forty-two".