1256130 has 48 divisors (see below), whose sum is σ = 3462264. Its totient is φ = 314880.

The previous prime is 1256107. The next prime is 1256149. The reversal of 1256130 is 316521.

Added to its reverse (316521) it gives a triangular number (1572651 = T₁₇₇₃).

It can be written as a sum of positive squares in 4 ways, for example, as 1034289 + 221841 = 1017^2 + 471^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

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, 1120 + ... + 1940.

2^1256130 is an apocalyptic number.

1256130 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 1256130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1731132).

1256130 is an abundant number, since it is smaller than the sum of its proper divisors (2206134).

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

1256130 is a wasteful number, since it uses less digits than its factorization.

1256130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851 (or 848 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1256130 is about 1120.7720553261. The cubic root of 1256130 is about 107.8975365649.

Adding to 1256130 its reverse (316521), we get a triangular number (1572651 = T₁₇₇₃).

The spelling of 1256130 in words is "one million, two hundred fifty-six thousand, one hundred thirty".