1290947 has 8 divisors (see below), whose sum is σ = 1483776. Its totient is φ = 1100232.

The previous prime is 1290937. The next prime is 1290983. The reversal of 1290947 is 7490921.

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

It is not a de Polignac number, because 1290947 - 2¹⁸ = 1028803 is a prime.

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 (1290907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1148 + ... + 1974.

It is an arithmetic number, because the mean of its divisors is an integer number (185472).

2^1290947 is an apocalyptic number.

1290947 is a deficient number, since it is larger than the sum of its proper divisors (192829).

1290947 is an equidigital number, since it uses as much as digits as its factorization.

1290947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1057.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 1290947 is about 1136.1984861810. The cubic root of 1290947 is about 108.8853548686.

The spelling of 1290947 in words is "one million, two hundred ninety thousand, nine hundred forty-seven".