1259635852225 has 9 divisors (see below), whose sum is σ = 1561955415267. Its totient is φ = 1007704192440.

The previous prime is 1259635852171. The next prime is 1259635852253. The reversal of 1259635852225 is 5222585369521.

The square root of 1259635852225 is 1122335.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 453468906801 + 806166945424 = 673401^2 + 897868^2 .

It is not a de Polignac number, because 1259635852225 - 2²¹ = 1259633755073 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5499442 + ... + 5723908.

Almost surely, 2^{1259635852225} is an apocalyptic number.

1259635852225 is the 1122335-th square number.

1259635852225 is the 561168-th centered octagonal number.

It is an amenable number.

1259635852225 is a deficient number, since it is larger than the sum of its proper divisors (302319563042).

1259635852225 is an frugal number, since it uses more digits than its factorization.

1259635852225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448944 (or 224472 counting only the distinct ones).

The product of its digits is 12960000, while the sum is 55.

The spelling of 1259635852225 in words is "one trillion, two hundred fifty-nine billion, six hundred thirty-five million, eight hundred fifty-two thousand, two hundred twenty-five".