1144709547921 has 45 divisors (see below), whose sum is σ = 1743648460939. Its totient is φ = 748407024144.

The previous prime is 1144709547907. The next prime is 1144709547941. The reversal of 1144709547921 is 1297459074411.

The square root of 1144709547921 is 1069911.

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

1144709547921 is a `hidden beast` number, since 1 + 1 + 4 + 4 + 7 + 0 + 9 + 547 + 92 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 825217812225 + 319491735696 = 908415^2 + 565236^2 .

It is not a de Polignac number, because 1144709547921 - 2¹⁷ = 1144709416849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1144709547901) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 510346426 + ... + 510348668.

Almost surely, 2^{1144709547921} is an apocalyptic number.

1144709547921 is the 1069911-st square number.

1144709547921 is the 534956-th centered octagonal number.

It is an amenable number.

1144709547921 is a deficient number, since it is larger than the sum of its proper divisors (598938913018).

1144709547921 is an frugal number, since it uses more digits than its factorization.

1144709547921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4604 (or 2299 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 54.

The spelling of 1144709547921 in words is "one trillion, one hundred forty-four billion, seven hundred nine million, five hundred forty-seven thousand, nine hundred twenty-one".