1296551 has 2 divisors, whose sum is σ = 1296552. Its totient is φ = 1296550.

The previous prime is 1296523. The next prime is 1296557. The reversal of 1296551 is 1556921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1296551 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1296557) 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 as a sum of consecutive naturals, namely, 648275 + 648276.

It is an arithmetic number, because the mean of its divisors is an integer number (648276).

2^1296551 is an apocalyptic number.

1296551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1296551 is an equidigital number, since it uses as much as digits as its factorization.

1296551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 29.

The square root of 1296551 is about 1138.6619340261. The cubic root of 1296551 is about 109.0426845142.

The spelling of 1296551 in words is "one million, two hundred ninety-six thousand, five hundred fifty-one".