4138642 has 8 divisors (see below), whose sum is σ = 6218316. Its totient is φ = 2065872.

The previous prime is 4138627. The next prime is 4138649. The reversal of 4138642 is 2468314.

It can be written as a sum of positive squares in 2 ways, for example, as 2859481 + 1279161 = 1691^2 + 1131^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 4138642.

It is not an unprimeable number, because it can be changed into a prime (4138649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208 + ... + 2884.

Almost surely, 2^4138642 is an apocalyptic number.

4138642 is a deficient number, since it is larger than the sum of its proper divisors (2079674).

4138642 is a wasteful number, since it uses less digits than its factorization.

4138642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3452.

The product of its digits is 4608, while the sum is 28.

The square root of 4138642 is about 2034.3652572731. The cubic root of 4138642 is about 160.5533186596.

It can be divided in two parts, 413864 and 2, that multiplied together give a palindrome (827728).

The spelling of 4138642 in words is "four million, one hundred thirty-eight thousand, six hundred forty-two".