102145623 has 4 divisors (see below), whose sum is σ = 136194168. Its totient is φ = 68097080.

The previous prime is 102145583. The next prime is 102145633. The reversal of 102145623 is 326541201.

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 102145623 - 2¹⁰ = 102144599 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102145593 and 102145602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102145633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17024268 + ... + 17024273.

It is an arithmetic number, because the mean of its divisors is an integer number (34048542).

Almost surely, 2^102145623 is an apocalyptic number.

102145623 is a deficient number, since it is larger than the sum of its proper divisors (34048545).

102145623 is an equidigital number, since it uses as much as digits as its factorization.

102145623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34048544.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 102145623 is about 10106.7117798026. The cubic root of 102145623 is about 467.4551195632.

Adding to 102145623 its reverse (326541201), we get a palindrome (428686824).

The spelling of 102145623 in words is "one hundred two million, one hundred forty-five thousand, six hundred twenty-three".