1296505 has 16 divisors (see below), whose sum is σ = 1883520. Its totient is φ = 836352.

The previous prime is 1296499. The next prime is 1296511. The reversal of 1296505 is 5056921.

It is an interprime number because it is at equal distance from previous prime (1296499) and next prime (1296511).

It is a 3-Lehmer number, since φ(1296505) divides (1296505-1)³.

It is a cyclic number.

It is not a de Polignac number, because 1296505 - 2⁵ = 1296473 is a prime.

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

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 495 + ... + 1684.

It is an arithmetic number, because the mean of its divisors is an integer number (117720).

2^1296505 is an apocalyptic number.

It is an amenable number.

1296505 is a deficient number, since it is larger than the sum of its proper divisors (587015).

1296505 is a wasteful number, since it uses less digits than its factorization.

1296505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2208.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 1296505 is about 1138.6417346997. The cubic root of 1296505 is about 109.0413949331.

The spelling of 1296505 in words is "one million, two hundred ninety-six thousand, five hundred five".