1165121437 has 2 divisors, whose sum is σ = 1165121438. Its totient is φ = 1165121436.

The previous prime is 1165121413. The next prime is 1165121459. The reversal of 1165121437 is 7341215611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 964785721 + 200335716 = 31061^2 + 14154^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1165121437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1165121399 and 1165121408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1165124437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582560718 + 582560719.

It is an arithmetic number, because the mean of its divisors is an integer number (582560719).

Almost surely, 2^1165121437 is an apocalyptic number.

It is an amenable number.

1165121437 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165121437 is an equidigital number, since it uses as much as digits as its factorization.

1165121437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 31.

The square root of 1165121437 is about 34133.8752121701. The cubic root of 1165121437 is about 1052.2616215860.

The spelling of 1165121437 in words is "one billion, one hundred sixty-five million, one hundred twenty-one thousand, four hundred thirty-seven".