102040445 has 16 divisors (see below), whose sum is σ = 132690432. Its totient is φ = 74882880.

The previous prime is 102040403. The next prime is 102040447. The reversal of 102040445 is 544040201.

It is not a de Polignac number, because 102040445 - 2¹⁶ = 101974909 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 (102040447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5780 + ... + 15410.

It is an arithmetic number, because the mean of its divisors is an integer number (8293152).

Almost surely, 2^102040445 is an apocalyptic number.

It is an amenable number.

102040445 is a deficient number, since it is larger than the sum of its proper divisors (30649987).

102040445 is a wasteful number, since it uses less digits than its factorization.

102040445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9812.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 102040445 is about 10101.5070657798. The cubic root of 102040445 is about 467.2946203400.

Adding to 102040445 its reverse (544040201), we get a palindrome (646080646).

The spelling of 102040445 in words is "one hundred two million, forty thousand, four hundred forty-five".