1256530 has 16 divisors (see below), whose sum is σ = 2467584. Its totient is φ = 456880.

The previous prime is 1256477. The next prime is 1256531. The reversal of 1256530 is 356521.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (1256531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5602 + ... + 5821.

It is an arithmetic number, because the mean of its divisors is an integer number (154224).

2^1256530 is an apocalyptic number.

1256530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1256530 is a deficient number, since it is larger than the sum of its proper divisors (1211054).

1256530 is a wasteful number, since it uses less digits than its factorization.

1256530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11441.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 1256530 is about 1120.9504895400. The cubic root of 1256530 is about 107.9089882550.

Subtracting from 1256530 its reverse (356521), we obtain a palindrome (900009).

The spelling of 1256530 in words is "one million, two hundred fifty-six thousand, five hundred thirty".