1161452131 has 4 divisors (see below), whose sum is σ = 1327373872. Its totient is φ = 995530392.

The previous prime is 1161452113. The next prime is 1161452147. The reversal of 1161452131 is 1312541611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1312541611 = 35963 ⋅36497.

It is a cyclic number.

It is not a de Polignac number, because 1161452131 - 2⁷ = 1161452003 is a prime.

It is a super-4 number, since 4×1161452131⁴ (a number of 37 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1161452096 and 1161452105.

It is not an unprimeable number, because it can be changed into a prime (1161452731) 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, 82960860 + ... + 82960873.

It is an arithmetic number, because the mean of its divisors is an integer number (331843468).

Almost surely, 2^1161452131 is an apocalyptic number.

1161452131 is a deficient number, since it is larger than the sum of its proper divisors (165921741).

1161452131 is an equidigital number, since it uses as much as digits as its factorization.

1161452131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165921740.

The product of its digits is 720, while the sum is 25.

The square root of 1161452131 is about 34080.0840814690. The cubic root of 1161452131 is about 1051.1558340758.

Adding to 1161452131 its reverse (1312541611), we get a palindrome (2473993742).

The spelling of 1161452131 in words is "one billion, one hundred sixty-one million, four hundred fifty-two thousand, one hundred thirty-one".