1120145231 has 4 divisors (see below), whose sum is σ = 1127280072. Its totient is φ = 1113010392.

The previous prime is 1120145179. The next prime is 1120145269. The reversal of 1120145231 is 1325410211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1325410211 = 1607 ⋅824773.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1120145231 is a prime.

It is a super-2 number, since 2×1120145231² = 2509450677064086722, which 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 (1120145281) 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, 3567185 + ... + 3567498.

It is an arithmetic number, because the mean of its divisors is an integer number (281820018).

Almost surely, 2^1120145231 is an apocalyptic number.

1120145231 is a deficient number, since it is larger than the sum of its proper divisors (7134841).

1120145231 is an equidigital number, since it uses as much as digits as its factorization.

1120145231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7134840.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1120145231 is about 33468.5707941047. The cubic root of 1120145231 is about 1038.5437059963.

Adding to 1120145231 its reverse (1325410211), we get a palindrome (2445555442).

The spelling of 1120145231 in words is "one billion, one hundred twenty million, one hundred forty-five thousand, two hundred thirty-one".