1521126000689 has 2 divisors, whose sum is σ = 1521126000690. Its totient is φ = 1521126000688.

The previous prime is 1521126000631. The next prime is 1521126000703. The reversal of 1521126000689 is 9860006211251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1170490299664 + 350635701025 = 1081892^2 + 592145^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1521126000689 is a prime.

It is a super-2 number, since 2×1521126000689² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1521126000089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760563000344 + 760563000345.

It is an arithmetic number, because the mean of its divisors is an integer number (760563000345).

Almost surely, 2^{1521126000689} is an apocalyptic number.

It is an amenable number.

1521126000689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1521126000689 is an equidigital number, since it uses as much as digits as its factorization.

1521126000689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 41.

The spelling of 1521126000689 in words is "one trillion, five hundred twenty-one billion, one hundred twenty-six million, six hundred eighty-nine", and thus it is an aban number.