102521075 has 12 divisors (see below), whose sum is σ = 127385448. Its totient is φ = 81849600.

The previous prime is 102521071. The next prime is 102521077. The reversal of 102521075 is 570125201.

It is a happy number.

It is not a de Polignac number, because 102521075 - 2² = 102521071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102521075.

It is not an unprimeable number, because it can be changed into a prime (102521071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9155 + ... + 16995.

It is an arithmetic number, because the mean of its divisors is an integer number (10615454).

Almost surely, 2^102521075 is an apocalyptic number.

102521075 is a deficient number, since it is larger than the sum of its proper divisors (24864373).

102521075 is an equidigital number, since it uses as much as digits as its factorization.

102521075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8374 (or 8369 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 102521075 is about 10125.2691322256. The cubic root of 102521075 is about 468.0271537438.

Adding to 102521075 its reverse (570125201), we get a palindrome (672646276).

The spelling of 102521075 in words is "one hundred two million, five hundred twenty-one thousand, seventy-five".