1290255329 has 4 divisors (see below), whose sum is σ = 1407551280. Its totient is φ = 1172959380.

The previous prime is 1290255313. The next prime is 1290255349. The reversal of 1290255329 is 9235520921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9235520921 = 11 ⋅839592811.

It is a cyclic number.

It is not a de Polignac number, because 1290255329 - 2⁴ = 1290255313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1290255292 and 1290255301.

It is not an unprimeable number, because it can be changed into a prime (1290255349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58647959 + ... + 58647980.

It is an arithmetic number, because the mean of its divisors is an integer number (351887820).

Almost surely, 2^1290255329 is an apocalyptic number.

It is an amenable number.

1290255329 is a deficient number, since it is larger than the sum of its proper divisors (117295951).

1290255329 is a wasteful number, since it uses less digits than its factorization.

1290255329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117295950.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 1290255329 is about 35920.1242898741. The cubic root of 1290255329 is about 1088.6590498751.

The spelling of 1290255329 in words is "one billion, two hundred ninety million, two hundred fifty-five thousand, three hundred twenty-nine".