1256490 has 48 divisors (see below), whose sum is σ = 3414528. Its totient is φ = 319968.

The previous prime is 1256477. The next prime is 1256531. The reversal of 1256490 is 946521.

1256490 is a `hidden beast` number, since 12 + 5 + 649 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1767 + ... + 2373.

It is an arithmetic number, because the mean of its divisors is an integer number (71136).

2^1256490 is an apocalyptic number.

1256490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1256490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1707264).

1256490 is an abundant number, since it is smaller than the sum of its proper divisors (2158038).

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

1256490 is a wasteful number, since it uses less digits than its factorization.

1256490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1256490 is about 1120.9326473968. The cubic root of 1256490 is about 107.9078431953.

The spelling of 1256490 in words is "one million, two hundred fifty-six thousand, four hundred ninety".