1243122487 has 2 divisors, whose sum is σ = 1243122488. Its totient is φ = 1243122486.

The previous prime is 1243122431. The next prime is 1243122499. The reversal of 1243122487 is 7842213421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1243122487 - 2¹⁹ = 1242598199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1243122427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621561243 + 621561244.

It is an arithmetic number, because the mean of its divisors is an integer number (621561244).

Almost surely, 2^1243122487 is an apocalyptic number.

1243122487 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243122487 is an equidigital number, since it uses as much as digits as its factorization.

1243122487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21504, while the sum is 34.

The square root of 1243122487 is about 35257.9421832869. The cubic root of 1243122487 is about 1075.2380902603.

The spelling of 1243122487 in words is "one billion, two hundred forty-three million, one hundred twenty-two thousand, four hundred eighty-seven".