99102025 has 27 divisors (see below), whose sum is σ = 135823989.
Its totient is φ = 71676000.
The previous prime is 99102007. The next prime is 99102041. The reversal of 99102025 is 52020199.
It can be divided in two parts, 9910 and 2025, that added together give a triangular number (11935 = T154).
The square root of 99102025 is 9955.
It is a perfect power (a square), and thus also a powerful number.
It can be written as a sum of positive squares in 4 ways, for example, as 53187849 + 45914176 = 7293^2 + 6776^2
It is not a de Polignac number, because 99102025 - 211 = 99099977 is a prime.
It is a super-2 number, since 2×991020252 = 19642422718201250, which contains 22 as substring.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 99101984 and 99102002.
It is an unprimeable number.
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 26 ways as a sum of consecutive naturals, for example, 547435 + ... + 547615.
Almost surely, 299102025 is an apocalyptic number.
99102025 is the 9955-th square number.
99102025 is the 4978-th centered octagonal number.
It is an amenable number.
99102025 is a deficient number, since it is larger than the sum of its proper divisors (36721964).
99102025 is a wasteful number, since it uses less digits than its factorization.
99102025 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 394 (or 197 counting only the distinct ones).
The product of its (nonzero) digits is 1620, while the sum is 28.
The cubic root of 99102025 is about 462.7653602595.
The spelling of 99102025 in words is "ninety-nine million, one hundred two thousand, twenty-five".