1256930 has 8 divisors (see below), whose sum is σ = 2262492. Its totient is φ = 502768.

The previous prime is 1256923. The next prime is 1256939. The reversal of 1256930 is 396521.

It can be written as a sum of positive squares in 2 ways, for example, as 1256641 + 289 = 1121^2 + 17^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1256930.

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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62837 + ... + 62856.

2^1256930 is an apocalyptic number.

1256930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1256930 is a deficient number, since it is larger than the sum of its proper divisors (1005562).

1256930 is a wasteful number, since it uses less digits than its factorization.

1256930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125700.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 1256930 is about 1121.1288953550. The cubic root of 1256930 is about 107.9204375149.

The spelling of 1256930 in words is "one million, two hundred fifty-six thousand, nine hundred thirty".