4001242 has 12 divisors (see below), whose sum is σ = 6981930. Its totient is φ = 1714776.

The previous prime is 4001237. The next prime is 4001243. The reversal of 4001242 is 2421004.

It can be written as a sum of positive squares in only one way, i.e., 2099601 + 1901641 = 1449^2 + 1379^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (4001243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20317 + ... + 20512.

Almost surely, 2^4001242 is an apocalyptic number.

4001242 is a deficient number, since it is larger than the sum of its proper divisors (2980688).

4001242 is a wasteful number, since it uses less digits than its factorization.

4001242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40845 (or 40838 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 4001242 is about 2000.3104759012. The cubic root of 4001242 is about 158.7565330975.

Adding to 4001242 its reverse (2421004), we get a palindrome (6422246).

The spelling of 4001242 in words is "four million, one thousand, two hundred forty-two".