4025642 has 4 divisors (see below), whose sum is σ = 6038466. Its totient is φ = 2012820.

The previous prime is 4025633. The next prime is 4025653. The reversal of 4025642 is 2465204.

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., 3418801 + 606841 = 1849^2 + 779^2 .

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 as a sum of consecutive naturals, namely, 1006409 + ... + 1006412.

Almost surely, 2^4025642 is an apocalyptic number.

4025642 is a deficient number, since it is larger than the sum of its proper divisors (2012824).

4025642 is a wasteful number, since it uses less digits than its factorization.

4025642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2012823.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 4025642 is about 2006.4002591706. The cubic root of 4025642 is about 159.0785840990.

The spelling of 4025642 in words is "four million, twenty-five thousand, six hundred forty-two".