1295346725689 has 9 divisors (see below), whose sum is σ = 1376046314157. Its totient is φ = 1219131649344.

The previous prime is 1295346725671. The next prime is 1295346725713. The reversal of 1295346725689 is 9865276435921.

The square root of 1295346725689 is 1138133.

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

It can be written as a sum of positive squares in 4 ways, for example, as 729102515625 + 566244210064 = 853875^2 + 752492^2 .

It is not a de Polignac number, because 1295346725689 - 2²¹ = 1295344628537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1295346725669) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 19314787 + ... + 19381735.

Almost surely, 2^{1295346725689} is an apocalyptic number.

1295346725689 is the 1138133-rd square number.

1295346725689 is the 569067-th centered octagonal number.

It is an amenable number.

1295346725689 is a deficient number, since it is larger than the sum of its proper divisors (80699588468).

1295346725689 is an frugal number, since it uses more digits than its factorization.

1295346725689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133932 (or 66966 counting only the distinct ones).

The product of its digits is 195955200, while the sum is 67.

The spelling of 1295346725689 in words is "one trillion, two hundred ninety-five billion, three hundred forty-six million, seven hundred twenty-five thousand, six hundred eighty-nine".