1296388 has 6 divisors (see below), whose sum is σ = 2268686. Its totient is φ = 648192.

The previous prime is 1296371. The next prime is 1296391. The reversal of 1296388 is 8836921.

It can be written as a sum of positive squares in only one way, i.e., 669124 + 627264 = 818^2 + 792^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162045 + ... + 162052.

2^1296388 is an apocalyptic number.

It is an amenable number.

1296388 is a deficient number, since it is larger than the sum of its proper divisors (972298).

1296388 is a wasteful number, since it uses less digits than its factorization.

1296388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324101 (or 324099 counting only the distinct ones).

The product of its digits is 20736, while the sum is 37.

The square root of 1296388 is about 1138.5903565374. The cubic root of 1296388 is about 109.0381147743.

The spelling of 1296388 in words is "one million, two hundred ninety-six thousand, three hundred eighty-eight".