100642538 has 8 divisors (see below), whose sum is σ = 151194180. Its totient is φ = 50244480.

The previous prime is 100642537. The next prime is 100642559. The reversal of 100642538 is 835246001.

It can be written as a sum of positive squares in 2 ways, for example, as 85063729 + 15578809 = 9223^2 + 3947^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 100642538.

It is not an unprimeable number, because it can be changed into a prime (100642537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36743 + ... + 39386.

Almost surely, 2^100642538 is an apocalyptic number.

100642538 is a deficient number, since it is larger than the sum of its proper divisors (50551642).

100642538 is an equidigital number, since it uses as much as digits as its factorization.

100642538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76792.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 100642538 is about 10032.0754582489. The cubic root of 100642538 is about 465.1508941053.

Adding to 100642538 its reverse (835246001), we get a palindrome (935888539).

The spelling of 100642538 in words is "one hundred million, six hundred forty-two thousand, five hundred thirty-eight".