4156642 has 16 divisors (see below), whose sum is σ = 7153920. Its totient is φ = 1774368.

The previous prime is 4156639. The next prime is 4156643. The reversal of 4156642 is 2466514.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 4156642.

It is not an unprimeable number, because it can be changed into a prime (4156643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4734 + ... + 5542.

It is an arithmetic number, because the mean of its divisors is an integer number (447120).

Almost surely, 2^4156642 is an apocalyptic number.

4156642 is a deficient number, since it is larger than the sum of its proper divisors (2997278).

4156642 is a wasteful number, since it uses less digits than its factorization.

4156642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185.

The product of its digits is 5760, while the sum is 28.

The square root of 4156642 is about 2038.7844417692. The cubic root of 4156642 is about 160.7857443448.

The spelling of 4156642 in words is "four million, one hundred fifty-six thousand, six hundred forty-two".