1256477 has 2 divisors, whose sum is σ = 1256478. Its totient is φ = 1256476.

The previous prime is 1256449. The next prime is 1256531. The reversal of 1256477 is 7746521.

1256477 is nontrivially palindromic in base 3.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 649636 + 606841 = 806^2 + 779^2 .

It is a cyclic number.

It is not a de Polignac number, because 1256477 - 2¹⁰ = 1255453 is a prime.

It is a Chen prime.

It is equal to p₉₆₉₁₇ and since 1256477 and 96917 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1256407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628238 + 628239.

It is an arithmetic number, because the mean of its divisors is an integer number (628239).

2^1256477 is an apocalyptic number.

It is an amenable number.

1256477 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256477 is an equidigital number, since it uses as much as digits as its factorization.

1256477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11760, while the sum is 32.

The square root of 1256477 is about 1120.9268486391. The cubic root of 1256477 is about 107.9074710457.

The spelling of 1256477 in words is "one million, two hundred fifty-six thousand, four hundred seventy-seven".