1145612231 has 8 divisors (see below), whose sum is σ = 1161194160. Its totient is φ = 1130072832.

The previous prime is 1145612227. The next prime is 1145612243. The reversal of 1145612231 is 1322165411.

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 1145612231 - 2² = 1145612227 is a prime.

It is a super-2 number, since 2×1145612231² = 2624854767633594722, which contains 22 as substring.

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 1145612231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145612261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45605 + ... + 66113.

It is an arithmetic number, because the mean of its divisors is an integer number (145149270).

Almost surely, 2^1145612231 is an apocalyptic number.

1145612231 is a deficient number, since it is larger than the sum of its proper divisors (15581929).

1145612231 is an equidigital number, since it uses as much as digits as its factorization.

1145612231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21265.

The product of its digits is 1440, while the sum is 26.

The square root of 1145612231 is about 33846.8939638484. The cubic root of 1145612231 is about 1046.3553854221.

Adding to 1145612231 its reverse (1322165411), we get a palindrome (2467777642).

The spelling of 1145612231 in words is "one billion, one hundred forty-five million, six hundred twelve thousand, two hundred thirty-one".