1020015225 has 36 divisors (see below), whose sum is σ = 1830309936. Its totient is φ = 543011040.

The previous prime is 1020015167. The next prime is 1020015233. The reversal of 1020015225 is 5225100201.

It is not a de Polignac number, because 1020015225 - 2⁸ = 1020014969 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1020015198 and 1020015207.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 128214 + ... + 135936.

Almost surely, 2^1020015225 is an apocalyptic number.

1020015225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1020015225 is a deficient number, since it is larger than the sum of its proper divisors (810294711).

1020015225 is a wasteful number, since it uses less digits than its factorization.

1020015225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8326 (or 8318 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 1020015225 is about 31937.6772010740. The cubic root of 1020015225 is about 1006.6277179766.

Adding to 1020015225 its reverse (5225100201), we get a palindrome (6245115426).

It can be divided in two parts, 10200 and 15225, that added together give a triangular number (25425 = T₂₂₅).

The spelling of 1020015225 in words is "one billion, twenty million, fifteen thousand, two hundred twenty-five".