1028126525 has 12 divisors (see below), whose sum is σ = 1292343252. Its totient is φ = 811232640.

The previous prime is 1028126521. The next prime is 1028126573. The reversal of 1028126525 is 5256218201.

1028126525 = T₉ + T₁₀ + ... + T₁₈₃₃.

It can be written as a sum of positive squares in 6 ways, for example, as 148766809 + 879359716 = 12197^2 + 29654^2 .

It is not a de Polignac number, because 1028126525 - 2² = 1028126521 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1028126491 and 1028126500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028126521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 279854 + ... + 283503.

It is an arithmetic number, because the mean of its divisors is an integer number (107695271).

Almost surely, 2^1028126525 is an apocalyptic number.

It is an amenable number.

1028126525 is a deficient number, since it is larger than the sum of its proper divisors (264216727).

1028126525 is an equidigital number, since it uses as much as digits as its factorization.

1028126525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563440 (or 563435 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 1028126525 is about 32064.4121262187. The cubic root of 1028126525 is about 1009.2889564563.

The spelling of 1028126525 in words is "one billion, twenty-eight million, one hundred twenty-six thousand, five hundred twenty-five".