4055642 has 4 divisors (see below), whose sum is σ = 6083466. Its totient is φ = 2027820.

The previous prime is 4055633. The next prime is 4055647. The reversal of 4055642 is 2465504.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2825761 + 1229881 = 1681^2 + 1109^2 .

It is not an unprimeable number, because it can be changed into a prime (4055647) 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 as a sum of consecutive naturals, namely, 1013909 + ... + 1013912.

Almost surely, 2^4055642 is an apocalyptic number.

4055642 is a deficient number, since it is larger than the sum of its proper divisors (2027824).

4055642 is a wasteful number, since it uses less digits than its factorization.

4055642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027823.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 4055642 is about 2013.8624580641. The cubic root of 4055642 is about 159.4727697935.

The spelling of 4055642 in words is "four million, fifty-five thousand, six hundred forty-two".