1291297006 has 4 divisors (see below), whose sum is σ = 1936945512. Its totient is φ = 645648502.

The previous prime is 1291296997. The next prime is 1291297099. The reversal of 1291297006 is 6007921921.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322824250 + ... + 322824253.

It is an arithmetic number, because the mean of its divisors is an integer number (484236378).

Almost surely, 2^1291297006 is an apocalyptic number.

1291297006 is a deficient number, since it is larger than the sum of its proper divisors (645648506).

1291297006 is an equidigital number, since it uses as much as digits as its factorization.

1291297006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645648505.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 1291297006 is about 35934.6212725277. The cubic root of 1291297006 is about 1088.9519443694.

The spelling of 1291297006 in words is "one billion, two hundred ninety-one million, two hundred ninety-seven thousand, six".