1148242320581 has 4 divisors (see below), whose sum is σ = 1148245685664. Its totient is φ = 1148238955500.

The previous prime is 1148242320571. The next prime is 1148242320647. The reversal of 1148242320581 is 1850232428411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1148242320581 - 2³⁴ = 1131062451397 is a prime.

It is a super-2 number, since 2×1148242320581² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1148242320571) 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 3 ways as a sum of consecutive naturals, for example, 1104515 + ... + 1875216.

It is an arithmetic number, because the mean of its divisors is an integer number (287061421416).

Almost surely, 2^{1148242320581} is an apocalyptic number.

It is an amenable number.

1148242320581 is a deficient number, since it is larger than the sum of its proper divisors (3365083).

1148242320581 is an equidigital number, since it uses as much as digits as its factorization.

1148242320581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3365082.

The product of its (nonzero) digits is 122880, while the sum is 41.

Adding to 1148242320581 its reverse (1850232428411), we get a palindrome (2998474748992).

The spelling of 1148242320581 in words is "one trillion, one hundred forty-eight billion, two hundred forty-two million, three hundred twenty thousand, five hundred eighty-one".