1256824 has 8 divisors (see below), whose sum is σ = 2356560. Its totient is φ = 628408.

The previous prime is 1256821. The next prime is 1256837. The reversal of 1256824 is 4286521.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 1256792 and 1256801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256821) 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, 78544 + ... + 78559.

It is an arithmetic number, because the mean of its divisors is an integer number (294570).

2^1256824 is an apocalyptic number.

It is an amenable number.

1256824 is a deficient number, since it is larger than the sum of its proper divisors (1099736).

1256824 is a wasteful number, since it uses less digits than its factorization.

1256824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157109 (or 157105 counting only the distinct ones).

The product of its digits is 3840, while the sum is 28.

The square root of 1256824 is about 1121.0816205790. The cubic root of 1256824 is about 107.9174036976.

It can be divided in two parts, 1256 and 824, that added together give a triangular number (2080 = T₆₄).

The spelling of 1256824 in words is "one million, two hundred fifty-six thousand, eight hundred twenty-four".