1256925 has 12 divisors (see below), whose sum is σ = 2078240. Its totient is φ = 670320.

The previous prime is 1256923. The next prime is 1256939. The reversal of 1256925 is 5296521.

It is a happy number.

It is not a de Polignac number, because 1256925 - 2¹ = 1256923 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 1256892 and 1256901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256923) 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 11 ways as a sum of consecutive naturals, for example, 8305 + ... + 8454.

2^1256925 is an apocalyptic number.

1256925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1256925 is a deficient number, since it is larger than the sum of its proper divisors (821315).

1256925 is a wasteful number, since it uses less digits than its factorization.

1256925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16772 (or 16767 counting only the distinct ones).

The product of its digits is 5400, while the sum is 30.

The square root of 1256925 is about 1121.1266654576. The cubic root of 1256925 is about 107.9202944142.

The spelling of 1256925 in words is "one million, two hundred fifty-six thousand, nine hundred twenty-five".