100542445 has 4 divisors (see below), whose sum is σ = 120650940. Its totient is φ = 80433952.

The previous prime is 100542439. The next prime is 100542451. The reversal of 100542445 is 544245001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 544245001 = 29 ⋅18767069.

It is an interprime number because it is at equal distance from previous prime (100542439) and next prime (100542451).

It can be written as a sum of positive squares in 2 ways, for example, as 68856804 + 31685641 = 8298^2 + 5629^2 .

It is a cyclic number.

It is not a de Polignac number, because 100542445 - 2¹³ = 100534253 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 3 ways as a sum of consecutive naturals, for example, 10054240 + ... + 10054249.

It is an arithmetic number, because the mean of its divisors is an integer number (30162735).

Almost surely, 2^100542445 is an apocalyptic number.

It is an amenable number.

100542445 is a deficient number, since it is larger than the sum of its proper divisors (20108495).

100542445 is an equidigital number, since it uses as much as digits as its factorization.

100542445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20108494.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 100542445 is about 10027.0855685987. The cubic root of 100542445 is about 464.9966392789.

Adding to 100542445 its reverse (544245001), we get a palindrome (644787446).

The spelling of 100542445 in words is "one hundred million, five hundred forty-two thousand, four hundred forty-five".