1345256244261 has 48 divisors (see below), whose sum is σ = 2020413979584. Its totient is φ = 894482797824.

The previous prime is 1345256244107. The next prime is 1345256244271. The reversal of 1345256244261 is 1624426525431.

It is a happy number.

1345256244261 is a `hidden beast` number, since 1 + 3 + 4 + 525 + 6 + 24 + 42 + 61 = 666.

It is not a de Polignac number, because 1345256244261 - 2¹⁰ = 1345256243237 is a prime.

It is a super-2 number, since 2×1345256244261² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345256244271) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 178246690 + ... + 178254236.

It is an arithmetic number, because the mean of its divisors is an integer number (42091957908).

Almost surely, 2^{1345256244261} is an apocalyptic number.

It is an amenable number.

1345256244261 is a deficient number, since it is larger than the sum of its proper divisors (675157735323).

1345256244261 is an equidigital number, since it uses as much as digits as its factorization.

1345256244261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9392 (or 9380 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 45.

The spelling of 1345256244261 in words is "one trillion, three hundred forty-five billion, two hundred fifty-six million, two hundred forty-four thousand, two hundred sixty-one".