1256730 has 32 divisors (see below), whose sum is σ = 3046464. Its totient is φ = 331776.

The previous prime is 1256729. The next prime is 1256737. The reversal of 1256730 is 376521.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1256730.

It is not an unprimeable number, because it can be changed into a prime (1256737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4762 + ... + 5018.

It is an arithmetic number, because the mean of its divisors is an integer number (95202).

2^1256730 is an apocalyptic number.

1256730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1256730 is an abundant number, since it is smaller than the sum of its proper divisors (1789734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1256730 is a wasteful number, since it uses less digits than its factorization.

1256730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 1256730 is about 1121.0396959965. The cubic root of 1256730 is about 107.9147131886.

The spelling of 1256730 in words is "one million, two hundred fifty-six thousand, seven hundred thirty".