102012505 has 16 divisors (see below), whose sum is σ = 140684544. Its totient is φ = 69560640.

The previous prime is 102012503. The next prime is 102012509. The reversal of 102012505 is 505210201.

It is not a de Polignac number, because 102012505 - 2¹ = 102012503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102012503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1717 + ... + 14386.

It is an arithmetic number, because the mean of its divisors is an integer number (8792784).

Almost surely, 2^102012505 is an apocalyptic number.

It is an amenable number.

102012505 is a deficient number, since it is larger than the sum of its proper divisors (38672039).

102012505 is a wasteful number, since it uses less digits than its factorization.

102012505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16296.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 102012505 is about 10100.1240091397. The cubic root of 102012505 is about 467.2519660000.

Adding to 102012505 its reverse (505210201), we get a palindrome (607222706).

The spelling of 102012505 in words is "one hundred two million, twelve thousand, five hundred five".