10205642 has 4 divisors (see below), whose sum is σ = 15308466. Its totient is φ = 5102820.

The previous prime is 10205621. The next prime is 10205659. The reversal of 10205642 is 24650201.

It is a happy number.

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., 9728161 + 477481 = 3119^2 + 691^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2551409 + ... + 2551412.

Almost surely, 2^10205642 is an apocalyptic number.

10205642 is a deficient number, since it is larger than the sum of its proper divisors (5102824).

10205642 is an equidigital number, since it uses as much as digits as its factorization.

10205642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5102823.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 10205642 is about 3194.6270517855. The cubic root of 10205642 is about 216.9102675000.

Adding to 10205642 its reverse (24650201), we get a palindrome (34855843).

The spelling of 10205642 in words is "ten million, two hundred five thousand, six hundred forty-two".