1256949 has 6 divisors (see below), whose sum is σ = 1815606. Its totient is φ = 837960.

The previous prime is 1256939. The next prime is 1256953. The reversal of 1256949 is 9496521.

It can be written as a sum of positive squares in only one way, i.e., 1102500 + 154449 = 1050^2 + 393^2 .

It is not a de Polignac number, because 1256949 - 2⁵ = 1256917 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 69822 + ... + 69839.

It is an arithmetic number, because the mean of its divisors is an integer number (302601).

2^1256949 is an apocalyptic number.

It is an amenable number.

1256949 is a deficient number, since it is larger than the sum of its proper divisors (558657).

1256949 is a wasteful number, since it uses less digits than its factorization.

1256949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139667 (or 139664 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 1256949 is about 1121.1373689250. The cubic root of 1256949 is about 107.9209812943.

The spelling of 1256949 in words is "one million, two hundred fifty-six thousand, nine hundred forty-nine".