1266851 has 2 divisors, whose sum is σ = 1266852. Its totient is φ = 1266850.

The previous prime is 1266847. The next prime is 1266869. The reversal of 1266851 is 1586621.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1586621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1266851 - 2² = 1266847 is a prime.

It is a super-2 number, since 2×1266851² = 3209822912402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1266841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633425 + 633426.

It is an arithmetic number, because the mean of its divisors is an integer number (633426).

2^1266851 is an apocalyptic number.

1266851 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266851 is an equidigital number, since it uses as much as digits as its factorization.

1266851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 29.

The square root of 1266851 is about 1125.5447569955. The cubic root of 1266851 is about 108.2036338685.

The spelling of 1266851 in words is "one million, two hundred sixty-six thousand, eight hundred fifty-one".