4021138 has 8 divisors (see below), whose sum is σ = 6580080. Its totient is φ = 1827780.

The previous prime is 4021099. The next prime is 4021151. The reversal of 4021138 is 8311204.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 91368 + ... + 91411.

It is an arithmetic number, because the mean of its divisors is an integer number (822510).

Almost surely, 2^4021138 is an apocalyptic number.

4021138 is a deficient number, since it is larger than the sum of its proper divisors (2558942).

4021138 is a wasteful number, since it uses less digits than its factorization.

4021138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182792.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 4021138 is about 2005.2775369011. The cubic root of 4021138 is about 159.0192347812.

It can be divided in two parts, 402 and 1138, that added together give a triangular number (1540 = T₅₅).

The spelling of 4021138 in words is "four million, twenty-one thousand, one hundred thirty-eight".