1291408270 has 8 divisors (see below), whose sum is σ = 2324534904. Its totient is φ = 516563304.

The previous prime is 1291408267. The next prime is 1291408271. The reversal of 1291408270 is 728041921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291408271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64570404 + ... + 64570423.

It is an arithmetic number, because the mean of its divisors is an integer number (290566863).

Almost surely, 2^1291408270 is an apocalyptic number.

1291408270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1291408270 is a deficient number, since it is larger than the sum of its proper divisors (1033126634).

1291408270 is a wasteful number, since it uses less digits than its factorization.

1291408270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129140834.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 1291408270 is about 35936.1693840621. The cubic root of 1291408270 is about 1088.9832198154.

The spelling of 1291408270 in words is "one billion, two hundred ninety-one million, four hundred eight thousand, two hundred seventy".