1295023516081 has 3 divisors (see below), whose sum is σ = 1295024654073. Its totient is φ = 1295022378090.

The previous prime is 1295023516067. The next prime is 1295023516091. The reversal of 1295023516081 is 1806153205921.

The square root of 1295023516081 is 1137991.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1295023516081 - 2¹³ = 1295023507889 is a prime.

It is a super-2 number, since 2×1295023516081² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1295023516051) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 568996 + ... + 1706986.

It is an arithmetic number, because the mean of its divisors is an integer number (431674884691).

Almost surely, 2^{1295023516081} is an apocalyptic number.

1295023516081 is the 1137991-st square number.

1295023516081 is the 568996-th centered octagonal number.

It is an amenable number.

1295023516081 is a deficient number, since it is larger than the sum of its proper divisors (1137992).

1295023516081 is an frugal number, since it uses more digits than its factorization.

1295023516081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2275982 (or 1137991 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 43.

The spelling of 1295023516081 in words is "one trillion, two hundred ninety-five billion, twenty-three million, five hundred sixteen thousand, eighty-one".