4187642 has 4 divisors (see below), whose sum is σ = 6281466. Its totient is φ = 2093820.

The previous prime is 4187611. The next prime is 4187647. The reversal of 4187642 is 2467814.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2467814 = 2 ⋅1233907.

It can be written as a sum of positive squares in only one way, i.e., 2627641 + 1560001 = 1621^2 + 1249^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4187599 and 4187608.

It is not an unprimeable number, because it can be changed into a prime (4187647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1046909 + ... + 1046912.

Almost surely, 2^4187642 is an apocalyptic number.

4187642 is a deficient number, since it is larger than the sum of its proper divisors (2093824).

4187642 is a wasteful number, since it uses less digits than its factorization.

4187642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2093823.

The product of its digits is 10752, while the sum is 32.

The square root of 4187642 is about 2046.3728887962. The cubic root of 4187642 is about 161.1844650863.

The spelling of 4187642 in words is "four million, one hundred eighty-seven thousand, six hundred forty-two".