1256830 has 8 divisors (see below), whose sum is σ = 2262312. Its totient is φ = 502728.

The previous prime is 1256821. The next prime is 1256837. The reversal of 1256830 is 386521.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1256795 and 1256804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256837) 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 3 ways as a sum of consecutive naturals, for example, 62832 + ... + 62851.

It is an arithmetic number, because the mean of its divisors is an integer number (282789).

2^1256830 is an apocalyptic number.

1256830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1256830 is a deficient number, since it is larger than the sum of its proper divisors (1005482).

1256830 is a wasteful number, since it uses less digits than its factorization.

1256830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125690.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1256830 is about 1121.0842965629. The cubic root of 1256830 is about 107.9175754277.

The spelling of 1256830 in words is "one million, two hundred fifty-six thousand, eight hundred thirty".