102020545 has 12 divisors (see below), whose sum is σ = 134566740. Its totient is φ = 74196320.

The previous prime is 102020537. The next prime is 102020561. The reversal of 102020545 is 545020201.

It can be written as a sum of positive squares in 2 ways, for example, as 76860289 + 25160256 = 8767^2 + 5016^2 .

It is not a de Polignac number, because 102020545 - 2³ = 102020537 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83710 + ... + 84919.

It is an arithmetic number, because the mean of its divisors is an integer number (11213895).

Almost surely, 2^102020545 is an apocalyptic number.

It is an amenable number.

102020545 is a deficient number, since it is larger than the sum of its proper divisors (32546195).

102020545 is a wasteful number, since it uses less digits than its factorization.

102020545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168656 (or 168645 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 102020545 is about 10100.5220162128. The cubic root of 102020545 is about 467.2642409889.

Adding to 102020545 its reverse (545020201), we get a palindrome (647040746).

The spelling of 102020545 in words is "one hundred two million, twenty thousand, five hundred forty-five".