1131596945 has 4 divisors (see below), whose sum is σ = 1357916340. Its totient is φ = 905277552.

The previous prime is 1131596933. The next prime is 1131596971. The reversal of 1131596945 is 5496951311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5496951311 = 43 ⋅127836077.

It can be written as a sum of positive squares in 2 ways, for example, as 777517456 + 354079489 = 27884^2 + 18817^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131596945 - 2⁴ = 1131596929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1131596896 and 1131596905.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113159690 + ... + 113159699.

It is an arithmetic number, because the mean of its divisors is an integer number (339479085).

Almost surely, 2^1131596945 is an apocalyptic number.

It is an amenable number.

1131596945 is a deficient number, since it is larger than the sum of its proper divisors (226319395).

1131596945 is an equidigital number, since it uses as much as digits as its factorization.

1131596945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226319394.

The product of its digits is 145800, while the sum is 44.

The square root of 1131596945 is about 33639.2173660447. The cubic root of 1131596945 is about 1042.0708690837.

The spelling of 1131596945 in words is "one billion, one hundred thirty-one million, five hundred ninety-six thousand, nine hundred forty-five".