1121254385449 has 9 divisors (see below), whose sum is σ = 1232465970589. Its totient is φ = 1019311579660.

The previous prime is 1121254385443. The next prime is 1121254385513. The reversal of 1121254385449 is 9445834521211.

It is a happy number.

The square root of 1121254385449 is 1058893.

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

It is a de Polignac number, because none of the positive numbers 2^k-1121254385449 is a prime.

It is a super-2 number, since 2×1121254385449² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121254385443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11599692 + ... + 11695954.

Almost surely, 2^{1121254385449} is an apocalyptic number.

1121254385449 is the 1058893-rd square number.

1121254385449 is the 529447-th centered octagonal number.

It is an amenable number.

1121254385449 is a deficient number, since it is larger than the sum of its proper divisors (111211585140).

1121254385449 is an frugal number, since it uses more digits than its factorization.

1121254385449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192548 (or 96274 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 49.

Multiplying 1121254385449 by its sum of digits (49), we get a square (54941464887001 = 7412251²).

The spelling of 1121254385449 in words is "one trillion, one hundred twenty-one billion, two hundred fifty-four million, three hundred eighty-five thousand, four hundred forty-nine".