1291530248 has 8 divisors (see below), whose sum is σ = 2421619230. Its totient is φ = 645765120.

The previous prime is 1291530221. The next prime is 1291530269. The reversal of 1291530248 is 8420351921.

It can be written as a sum of positive squares in only one way, i.e., 848090884 + 443439364 = 29122^2 + 21058^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80720633 + ... + 80720648.

Almost surely, 2^1291530248 is an apocalyptic number.

It is an amenable number.

1291530248 is a deficient number, since it is larger than the sum of its proper divisors (1130088982).

1291530248 is a wasteful number, since it uses less digits than its factorization.

1291530248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161441287 (or 161441283 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 1291530248 is about 35937.8664920443. The cubic root of 1291530248 is about 1089.0175048194.

The spelling of 1291530248 in words is "one billion, two hundred ninety-one million, five hundred thirty thousand, two hundred forty-eight".