1290275387 has 2 divisors, whose sum is σ = 1290275388. Its totient is φ = 1290275386.

The previous prime is 1290275381. The next prime is 1290275419. The reversal of 1290275387 is 7835720921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1290275387 - 2⁸ = 1290275131 is a prime.

It is not a weakly prime, because it can be changed into another prime (1290275381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 645137693 + 645137694.

It is an arithmetic number, because the mean of its divisors is an integer number (645137694).

Almost surely, 2^1290275387 is an apocalyptic number.

1290275387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1290275387 is an equidigital number, since it uses as much as digits as its factorization.

1290275387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 1290275387 is about 35920.4034916091. The cubic root of 1290275387 is about 1088.6646911900.

The spelling of 1290275387 in words is "one billion, two hundred ninety million, two hundred seventy-five thousand, three hundred eighty-seven".