1296947290 has 8 divisors (see below), whose sum is σ = 2334505140. Its totient is φ = 518778912.

The previous prime is 1296947287. The next prime is 1296947297. The reversal of 1296947290 is 927496921.

It can be written as a sum of positive squares in 2 ways, for example, as 1296648081 + 299209 = 36009^2 + 547^2 .

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

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (1296947297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64847355 + ... + 64847374.

Almost surely, 2^1296947290 is an apocalyptic number.

1296947290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1296947290 is a deficient number, since it is larger than the sum of its proper divisors (1037557850).

1296947290 is a wasteful number, since it uses less digits than its factorization.

1296947290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129694736.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 1296947290 is about 36013.1544022459. The cubic root of 1296947290 is about 1090.5379299186.

The spelling of 1296947290 in words is "one billion, two hundred ninety-six million, nine hundred forty-seven thousand, two hundred ninety".