100642445 has 8 divisors (see below), whose sum is σ = 122300160. Its totient is φ = 79494480.

The previous prime is 100642387. The next prime is 100642471. The reversal of 100642445 is 544246001.

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

It is not a de Polignac number, because 100642445 - 2⁸ = 100642189 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127001 + ... + 127790.

It is an arithmetic number, because the mean of its divisors is an integer number (15287520).

Almost surely, 2^100642445 is an apocalyptic number.

It is an amenable number.

100642445 is a deficient number, since it is larger than the sum of its proper divisors (21657715).

100642445 is an equidigital number, since it uses as much as digits as its factorization.

100642445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254875.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 100642445 is about 10032.0708231152. The cubic root of 100642445 is about 465.1507508291.

Adding to 100642445 its reverse (544246001), we get a palindrome (644888446).

The spelling of 100642445 in words is "one hundred million, six hundred forty-two thousand, four hundred forty-five".