1125021025 has 12 divisors (see below), whose sum is σ = 1395833404. Its totient is φ = 899496000.

The previous prime is 1125020993. The next prime is 1125021043. The reversal of 1125021025 is 5201205211.

It can be written as a sum of positive squares in 6 ways, for example, as 164454976 + 960566049 = 12824^2 + 30993^2 .

It is not a de Polignac number, because 1125021025 - 2⁵ = 1125020993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1125020993 and 1125021011.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34435 + ... + 58615.

Almost surely, 2^1125021025 is an apocalyptic number.

It is an amenable number.

1125021025 is a deficient number, since it is larger than the sum of its proper divisors (270812379).

1125021025 is a wasteful number, since it uses less digits than its factorization.

1125021025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26052 (or 26047 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 1125021025 is about 33541.3330832273. Note that the first 3 decimals coincide. The cubic root of 1125021025 is about 1040.0483905615.

Adding to 1125021025 its reverse (5201205211), we get a palindrome (6326226236).

The spelling of 1125021025 in words is "one billion, one hundred twenty-five million, twenty-one thousand, twenty-five".