102520804 has 6 divisors (see below), whose sum is σ = 179411414. Its totient is φ = 51260400.

The previous prime is 102520793. The next prime is 102520807. The reversal of 102520804 is 408025201.

It can be written as a sum of positive squares in only one way, i.e., 65286400 + 37234404 = 8080^2 + 6102^2 .

It is not an unprimeable number, because it can be changed into a prime (102520807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12815097 + ... + 12815104.

Almost surely, 2^102520804 is an apocalyptic number.

It is an amenable number.

102520804 is a deficient number, since it is larger than the sum of its proper divisors (76890610).

102520804 is a wasteful number, since it uses less digits than its factorization.

102520804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25630205 (or 25630203 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 102520804 is about 10125.2557498564. The cubic root of 102520804 is about 468.0267413556.

The spelling of 102520804 in words is "one hundred two million, five hundred twenty thousand, eight hundred four".