1020120225 has 48 divisors (see below), whose sum is σ = 1731764160. Its totient is φ = 529689600.

The previous prime is 1020120197. The next prime is 1020120247. The reversal of 1020120225 is 5220210201.

It is not a de Polignac number, because 1020120225 - 2⁶ = 1020120161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 446085 + ... + 448365.

It is an arithmetic number, because the mean of its divisors is an integer number (36078420).

Almost surely, 2^1020120225 is an apocalyptic number.

1020120225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1020120225 is a deficient number, since it is larger than the sum of its proper divisors (711643935).

1020120225 is a wasteful number, since it uses less digits than its factorization.

1020120225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2450 (or 2445 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1020120225 is about 31939.3209852683. The cubic root of 1020120225 is about 1006.6622574231.

Adding to 1020120225 its reverse (5220210201), we get a palindrome (6240330426).

The spelling of 1020120225 in words is "one billion, twenty million, one hundred twenty thousand, two hundred twenty-five".