1020279225 has 96 divisors (see below), whose sum is σ = 2083795200. Its totient is φ = 438789120.

The previous prime is 1020279217. The next prime is 1020279251. The reversal of 1020279225 is 5229720201.

It is not a de Polignac number, because 1020279225 - 2³ = 1020279217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020279192 and 1020279201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 436159 + ... + 438491.

It is an arithmetic number, because the mean of its divisors is an integer number (21706200).

Almost surely, 2^1020279225 is an apocalyptic number.

1020279225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1020279225 is an abundant number, since it is smaller than the sum of its proper divisors (1063515975).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1020279225 is a wasteful number, since it uses less digits than its factorization.

1020279225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2384 (or 2365 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 1020279225 is about 31941.8099831553. The cubic root of 1020279225 is about 1006.7145555019.

Adding to 1020279225 its reverse (5229720201), we get a palindrome (6249999426).

The spelling of 1020279225 in words is "one billion, twenty million, two hundred seventy-nine thousand, two hundred twenty-five".