1145400032521 has 4 divisors (see below), whose sum is σ = 1145402867200. Its totient is φ = 1145397197844.

The previous prime is 1145400032501. The next prime is 1145400032587. The reversal of 1145400032521 is 1252300045411.

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 1145400032521 - 2⁵ = 1145400032489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1145400032521.

It is not an unprimeable number, because it can be changed into a prime (1145400032501) 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, 685161 + ... + 1661398.

It is an arithmetic number, because the mean of its divisors is an integer number (286350716800).

Almost surely, 2^{1145400032521} is an apocalyptic number.

It is an amenable number.

1145400032521 is a deficient number, since it is larger than the sum of its proper divisors (2834679).

1145400032521 is an equidigital number, since it uses as much as digits as its factorization.

1145400032521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2834678.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 1145400032521 its reverse (1252300045411), we get a palindrome (2397700077932).

The spelling of 1145400032521 in words is "one trillion, one hundred forty-five billion, four hundred million, thirty-two thousand, five hundred twenty-one".