642238103 has 8 divisors (see below), whose sum is σ = 692008800. Its totient is φ = 592519968.

The previous prime is 642238049. The next prime is 642238169. The reversal of 642238103 is 301832246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 642238103 - 2¹⁸ = 641975959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642238603) 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, 14393 + ... + 38621.

It is an arithmetic number, because the mean of its divisors is an integer number (86501100).

Almost surely, 2^642238103 is an apocalyptic number.

642238103 is a deficient number, since it is larger than the sum of its proper divisors (49770697).

642238103 is a wasteful number, since it uses less digits than its factorization.

642238103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26281.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 642238103 is about 25342.4170709899. The cubic root of 642238103 is about 862.7772587031. Note that the first 3 decimals are identical.

The spelling of 642238103 in words is "six hundred forty-two million, two hundred thirty-eight thousand, one hundred three".