102143245 has 4 divisors (see below), whose sum is σ = 122571900. Its totient is φ = 81714592.

The previous prime is 102143159. The next prime is 102143257. The reversal of 102143245 is 542341201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 542341201 = 547 ⋅991483.

It can be written as a sum of positive squares in 2 ways, for example, as 75238276 + 26904969 = 8674^2 + 5187^2 .

It is a cyclic number.

It is not a de Polignac number, because 102143245 - 2²³ = 93754637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10214320 + ... + 10214329.

It is an arithmetic number, because the mean of its divisors is an integer number (30642975).

Almost surely, 2^102143245 is an apocalyptic number.

It is an amenable number.

102143245 is a deficient number, since it is larger than the sum of its proper divisors (20428655).

102143245 is an equidigital number, since it uses as much as digits as its factorization.

102143245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20428654.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 102143245 is about 10106.5941345243. The cubic root of 102143245 is about 467.4514920072.

Adding to 102143245 its reverse (542341201), we get a palindrome (644484446).

The spelling of 102143245 in words is "one hundred two million, one hundred forty-three thousand, two hundred forty-five".