1297906 has 4 divisors (see below), whose sum is σ = 1946862. Its totient is φ = 648952.

The previous prime is 1297873. The next prime is 1297927. The reversal of 1297906 is 6097921.

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

It can be written as a sum of positive squares in only one way, i.e., 919681 + 378225 = 959^2 + 615^2 .

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, 324475 + ... + 324478.

2^1297906 is an apocalyptic number.

1297906 is a deficient number, since it is larger than the sum of its proper divisors (648956).

1297906 is an equidigital number, since it uses as much as digits as its factorization.

1297906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648955.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 1297906 is about 1139.2567752706. The cubic root of 1297906 is about 109.0806574121.

The spelling of 1297906 in words is "one million, two hundred ninety-seven thousand, nine hundred six".