1125213517 has 2 divisors, whose sum is σ = 1125213518. Its totient is φ = 1125213516.

The previous prime is 1125213499. The next prime is 1125213533. The reversal of 1125213517 is 7153125211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 816473476 + 308740041 = 28574^2 + 17571^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1125213517 is a prime.

It is a super-2 number, since 2×1125213517² = 2532210917679018578, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1125213587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562606758 + 562606759.

It is an arithmetic number, because the mean of its divisors is an integer number (562606759).

Almost surely, 2^1125213517 is an apocalyptic number.

It is an amenable number.

1125213517 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125213517 is an equidigital number, since it uses as much as digits as its factorization.

1125213517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2100, while the sum is 28.

The square root of 1125213517 is about 33544.2024349961. The cubic root of 1125213517 is about 1040.1077048834.

Adding to 1125213517 its reverse (7153125211), we get a palindrome (8278338728).

The spelling of 1125213517 in words is "one billion, one hundred twenty-five million, two hundred thirteen thousand, five hundred seventeen".