1266457 has 4 divisors (see below), whose sum is σ = 1273636. Its totient is φ = 1259280.

The previous prime is 1266451. The next prime is 1266469. The reversal of 1266457 is 7546621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7546621 = 367 ⋅20563.

It can be written as a sum of positive squares in 2 ways, for example, as 151321 + 1115136 = 389^2 + 1056^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1266457 is a prime.

It is a super-3 number, since 3×1266457³ = 6093861803339837979, which contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1266451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3318 + ... + 3679.

It is an arithmetic number, because the mean of its divisors is an integer number (318409).

2^1266457 is an apocalyptic number.

It is an amenable number.

1266457 is a deficient number, since it is larger than the sum of its proper divisors (7179).

1266457 is an equidigital number, since it uses as much as digits as its factorization.

1266457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7178.

The product of its digits is 10080, while the sum is 31.

The square root of 1266457 is about 1125.3697170264. The cubic root of 1266457 is about 108.1924153295.

It can be divided in two parts, 12664 and 57, that added together give a palindrome (12721).

The spelling of 1266457 in words is "one million, two hundred sixty-six thousand, four hundred fifty-seven".