100642845 has 16 divisors (see below), whose sum is σ = 162594432. Its totient is φ = 53154240.

The previous prime is 100642831. The next prime is 100642877. The reversal of 100642845 is 548246001.

It is not a de Polignac number, because 100642845 - 2⁶ = 100642781 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 (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31026 + ... + 34115.

It is an arithmetic number, because the mean of its divisors is an integer number (10162152).

Almost surely, 2^100642845 is an apocalyptic number.

100642845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100642845 is a deficient number, since it is larger than the sum of its proper divisors (61951587).

100642845 is a wasteful number, since it uses less digits than its factorization.

100642845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65252.

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 100642845 is about 10032.0907591588. The cubic root of 100642845 is about 465.1513670703.

Adding to 100642845 its reverse (548246001), we get a palindrome (648888846).

The spelling of 100642845 in words is "one hundred million, six hundred forty-two thousand, eight hundred forty-five".