1145340242521 has 8 divisors (see below), whose sum is σ = 1158235661160. Its totient is φ = 1132445411328.

The previous prime is 1145340242491. The next prime is 1145340242533. The reversal of 1145340242521 is 1252420435411.

It can be written as a sum of positive squares in 4 ways, for example, as 294158708496 + 851181534025 = 542364^2 + 922595^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1145340242521 - 2¹⁵ = 1145340209753 is a prime.

It is a super-2 number, since 2×1145340242521² (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 (1145340242551) 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 7 ways as a sum of consecutive naturals, for example, 4651905 + ... + 4891921.

It is an arithmetic number, because the mean of its divisors is an integer number (144779457645).

Almost surely, 2^{1145340242521} is an apocalyptic number.

It is an amenable number.

1145340242521 is a deficient number, since it is larger than the sum of its proper divisors (12895418639).

1145340242521 is an equidigital number, since it uses as much as digits as its factorization.

1145340242521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293723.

The product of its (nonzero) digits is 38400, while the sum is 34.

Adding to 1145340242521 its reverse (1252420435411), we get a palindrome (2397760677932).

The spelling of 1145340242521 in words is "one trillion, one hundred forty-five billion, three hundred forty million, two hundred forty-two thousand, five hundred twenty-one".