1154681342721 has 27 divisors (see below), whose sum is σ = 1704338383683. Its totient is φ = 753310243440.

The previous prime is 1154681342707. The next prime is 1154681342723. The reversal of 1154681342721 is 1272431864511.

The square root of 1154681342721 is 1074561.

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

1154681342721 is a `hidden beast` number, since 1 + 1 + 546 + 8 + 1 + 34 + 2 + 72 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1022345454321 + 132335888400 = 1011111^2 + 363780^2 .

It is not a de Polignac number, because 1154681342721 - 2¹³ = 1154681334529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1154681342723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 151509291 + ... + 151516911.

Almost surely, 2^{1154681342721} is an apocalyptic number.

1154681342721 is the 1074561-st square number.

1154681342721 is the 537281-st centered octagonal number.

It is an amenable number.

1154681342721 is a deficient number, since it is larger than the sum of its proper divisors (549657040962).

1154681342721 is an frugal number, since it uses more digits than its factorization.

1154681342721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15342 (or 7671 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The spelling of 1154681342721 in words is "one trillion, one hundred fifty-four billion, six hundred eighty-one million, three hundred forty-two thousand, seven hundred twenty-one".