1851612 has 72 divisors (see below), whose sum is σ = 5209344. Its totient is φ = 510048.

The previous prime is 1851611. The next prime is 1851637. The reversal of 1851612 is 2161581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1851611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27603 + ... + 27669.

It is an arithmetic number, because the mean of its divisors is an integer number (72352).

2^1851612 is an apocalyptic number.

1851612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1851612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2604672).

1851612 is an abundant number, since it is smaller than the sum of its proper divisors (3357732).

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

1851612 is a wasteful number, since it uses less digits than its factorization.

1851612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135 (or 126 counting only the distinct ones).

The product of its digits is 480, while the sum is 24.

The square root of 1851612 is about 1360.7395048282. The cubic root of 1851612 is about 122.7957479951.

It can be divided in two parts, 18516 and 12, that added together give a triangular number (18528 = T₁₉₂).

The spelling of 1851612 in words is "one million, eight hundred fifty-one thousand, six hundred twelve".