1145242405531 has 4 divisors (see below), whose sum is σ = 1308848463472. Its totient is φ = 981636347592.

The previous prime is 1145242405519. The next prime is 1145242405537. The reversal of 1145242405531 is 1355042425411.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1145242405531 - 2¹¹ = 1145242403483 is a prime.

It is a super-2 number, since 2×1145242405531² (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 (1145242405537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81803028960 + ... + 81803028973.

It is an arithmetic number, because the mean of its divisors is an integer number (327212115868).

Almost surely, 2^{1145242405531} is an apocalyptic number.

1145242405531 is a deficient number, since it is larger than the sum of its proper divisors (163606057941).

1145242405531 is an equidigital number, since it uses as much as digits as its factorization.

1145242405531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163606057940.

The product of its (nonzero) digits is 96000, while the sum is 37.

The spelling of 1145242405531 in words is "one trillion, one hundred forty-five billion, two hundred forty-two million, four hundred five thousand, five hundred thirty-one".