1290266525 has 6 divisors (see below), whose sum is σ = 1599930522. Its totient is φ = 1032213200.

The previous prime is 1290266519. The next prime is 1290266539. The reversal of 1290266525 is 5256620921.

It can be written as a sum of positive squares in 3 ways, for example, as 121925764 + 1168340761 = 11042^2 + 34181^2 .

It is not a de Polignac number, because 1290266525 - 2¹⁴ = 1290250141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25805306 + ... + 25805355.

It is an arithmetic number, because the mean of its divisors is an integer number (266655087).

Almost surely, 2^1290266525 is an apocalyptic number.

It is an amenable number.

1290266525 is a deficient number, since it is larger than the sum of its proper divisors (309663997).

1290266525 is an equidigital number, since it uses as much as digits as its factorization.

1290266525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51610671 (or 51610666 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 1290266525 is about 35920.2801353219. The cubic root of 1290266525 is about 1088.6621987587.

The spelling of 1290266525 in words is "one billion, two hundred ninety million, two hundred sixty-six thousand, five hundred twenty-five".