1145421121 has 16 divisors (see below), whose sum is σ = 1308233808. Its totient is φ = 993484800.

The previous prime is 1145421119. The next prime is 1145421127. The reversal of 1145421121 is 1211245411.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1290496 + 1144130625 = 1136^2 + 33825^2 .

It is a cyclic number.

It is not a de Polignac number, because 1145421121 - 2¹ = 1145421119 is a prime.

It is a super-3 number, since 3×1145421121³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1145421092 and 1145421101.

It is not an unprimeable number, because it can be changed into a prime (1145421127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142161 + ... + 150001.

It is an arithmetic number, because the mean of its divisors is an integer number (81764613).

Almost surely, 2^1145421121 is an apocalyptic number.

It is an amenable number.

1145421121 is a deficient number, since it is larger than the sum of its proper divisors (162812687).

1145421121 is a wasteful number, since it uses less digits than its factorization.

1145421121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8532.

The product of its digits is 320, while the sum is 22.

The square root of 1145421121 is about 33844.0706919248. The cubic root of 1145421121 is about 1046.2971981656.

Adding to 1145421121 its reverse (1211245411), we get a palindrome (2356666532).

The spelling of 1145421121 in words is "one billion, one hundred forty-five million, four hundred twenty-one thousand, one hundred twenty-one".