102145543 has 4 divisors (see below), whose sum is σ = 102264768. Its totient is φ = 102026320.

The previous prime is 102145541. The next prime is 102145573. The reversal of 102145543 is 345541201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102145543 - 2¹ = 102145541 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 (102145541) 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 3 ways as a sum of consecutive naturals, for example, 58318 + ... + 60043.

It is an arithmetic number, because the mean of its divisors is an integer number (25566192).

Almost surely, 2^102145543 is an apocalyptic number.

102145543 is a deficient number, since it is larger than the sum of its proper divisors (119225).

102145543 is an equidigital number, since it uses as much as digits as its factorization.

102145543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119224.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 102145543 is about 10106.7078220358. The cubic root of 102145543 is about 467.4549975269.

Adding to 102145543 its reverse (345541201), we get a palindrome (447686744).

It can be divided in two parts, 1021 and 45543, that added together give a palindrome (46564).

The spelling of 102145543 in words is "one hundred two million, one hundred forty-five thousand, five hundred forty-three".