102140345 has 4 divisors (see below), whose sum is σ = 122568420. Its totient is φ = 81712272.

The previous prime is 102140329. The next prime is 102140347. The reversal of 102140345 is 543041201.

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

It can be written as a sum of positive squares in 2 ways, for example, as 33051001 + 69089344 = 5749^2 + 8312^2 .

It is a cyclic number.

It is not a de Polignac number, because 102140345 - 2⁴ = 102140329 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (102140347) 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, 10214030 + ... + 10214039.

It is an arithmetic number, because the mean of its divisors is an integer number (30642105).

Almost surely, 2^102140345 is an apocalyptic number.

It is an amenable number.

102140345 is a deficient number, since it is larger than the sum of its proper divisors (20428075).

102140345 is an equidigital number, since it uses as much as digits as its factorization.

102140345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20428074.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 102140345 is about 10106.4506628193. The cubic root of 102140345 is about 467.4470680822.

Adding to 102140345 its reverse (543041201), we get a palindrome (645181546).

The spelling of 102140345 in words is "one hundred two million, one hundred forty thousand, three hundred forty-five".