1851256 has 32 divisors (see below), whose sum is σ = 3841200. Its totient is φ = 829440.

The previous prime is 1851253. The next prime is 1851259. The reversal of 1851256 is 6521581.

It is an interprime number because it is at equal distance from previous prime (1851253) and next prime (1851259).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1851253) 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 7 ways as a sum of consecutive naturals, for example, 9496 + ... + 9688.

2^1851256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1851256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1920600).

1851256 is an abundant number, since it is smaller than the sum of its proper divisors (1989944).

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

1851256 is a wasteful number, since it uses less digits than its factorization.

1851256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319 (or 315 counting only the distinct ones).

The product of its digits is 2400, while the sum is 28.

The square root of 1851256 is about 1360.6086873161. The cubic root of 1851256 is about 122.7878777199.

It can be divided in two parts, 185 and 1256, that added together give a palindrome (1441).

The spelling of 1851256 in words is "one million, eight hundred fifty-one thousand, two hundred fifty-six".