1254171775561 has 16 divisors (see below), whose sum is σ = 1348362086400. Its totient is φ = 1162803055248.

The previous prime is 1254171775543. The next prime is 1254171775579. The reversal of 1254171775561 is 1655771714521.

It is an interprime number because it is at equal distance from previous prime (1254171775543) and next prime (1254171775579).

It is a cyclic number.

It is not a de Polignac number, because 1254171775561 - 2⁷ = 1254171775433 is a prime.

It is a super-2 number, since 2×1254171775561² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1254171775499 and 1254171775508.

It is not an unprimeable number, because it can be changed into a prime (1254171775061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15998286 + ... + 16076488.

It is an arithmetic number, because the mean of its divisors is an integer number (84272630400).

Almost surely, 2^{1254171775561} is an apocalyptic number.

It is an amenable number.

1254171775561 is a deficient number, since it is larger than the sum of its proper divisors (94190310839).

1254171775561 is a wasteful number, since it uses less digits than its factorization.

1254171775561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96228.

The product of its digits is 2058000, while the sum is 52.

The spelling of 1254171775561 in words is "one trillion, two hundred fifty-four billion, one hundred seventy-one million, seven hundred seventy-five thousand, five hundred sixty-one".