102145545 has 12 divisors (see below), whose sum is σ = 177052356. Its totient is φ = 54477600.

The previous prime is 102145541. The next prime is 102145573. The reversal of 102145545 is 545541201.

102145545 is a `hidden beast` number, since 102 + 1 + 4 + 554 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 74235456 + 27910089 = 8616^2 + 5283^2 .

It is not a de Polignac number, because 102145545 - 2² = 102145541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102145541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1134906 + ... + 1134995.

It is an arithmetic number, because the mean of its divisors is an integer number (14754363).

Almost surely, 2^102145545 is an apocalyptic number.

102145545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

102145545 is a deficient number, since it is larger than the sum of its proper divisors (74906811).

102145545 is a wasteful number, since it uses less digits than its factorization.

102145545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2269912 (or 2269909 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 102145545 is about 10106.7079209800. The cubic root of 102145545 is about 467.4550005778.

Adding to 102145545 its reverse (545541201), we get a palindrome (647686746).

The spelling of 102145545 in words is "one hundred two million, one hundred forty-five thousand, five hundred forty-five".