1144557243 has 16 divisors (see below), whose sum is σ = 1696268160. Its totient is φ = 762755688.

The previous prime is 1144557241. The next prime is 1144557247. The reversal of 1144557243 is 3427554411.

1144557243 is a `hidden beast` number, since 1 + 1 + 4 + 45 + 572 + 43 = 666.

It is not a de Polignac number, because 1144557243 - 2¹ = 1144557241 is a prime.

It is a super-2 number, since 2×1144557243² = 2620022565007522098, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1144557198 and 1144557207.

It is not an unprimeable number, because it can be changed into a prime (1144557241) 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, 87496 + ... + 99722.

It is an arithmetic number, because the mean of its divisors is an integer number (106016760).

Almost surely, 2^1144557243 is an apocalyptic number.

1144557243 is a deficient number, since it is larger than the sum of its proper divisors (551710917).

1144557243 is a wasteful number, since it uses less digits than its factorization.

1144557243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15703 (or 15697 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 1144557243 is about 33831.3056650198. The cubic root of 1144557243 is about 1046.0340924706.

The spelling of 1144557243 in words is "one billion, one hundred forty-four million, five hundred fifty-seven thousand, two hundred forty-three".