1286945239 has 2 divisors, whose sum is σ = 1286945240. Its totient is φ = 1286945238.

The previous prime is 1286945213. The next prime is 1286945263. The reversal of 1286945239 is 9325496821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1286945239 - 2¹⁹ = 1286420951 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1286945192 and 1286945201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1286945299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643472619 + 643472620.

It is an arithmetic number, because the mean of its divisors is an integer number (643472620).

Almost surely, 2^1286945239 is an apocalyptic number.

1286945239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1286945239 is an equidigital number, since it uses as much as digits as its factorization.

1286945239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 49.

The square root of 1286945239 is about 35874.0189970402. The cubic root of 1286945239 is about 1087.7272845774.

The spelling of 1286945239 in words is "one billion, two hundred eighty-six million, nine hundred forty-five thousand, two hundred thirty-nine".