1851340 has 12 divisors (see below), whose sum is σ = 3887856. Its totient is φ = 740528.

The previous prime is 1851337. The next prime is 1851349. The reversal of 1851340 is 431581.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (1851349) 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 3 ways as a sum of consecutive naturals, for example, 46264 + ... + 46303.

It is an arithmetic number, because the mean of its divisors is an integer number (323988).

2^1851340 is an apocalyptic number.

1851340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1851340 is an abundant number, since it is smaller than the sum of its proper divisors (2036516).

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

1851340 is a wasteful number, since it uses less digits than its factorization.

1851340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92576 (or 92574 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1851340 is about 1360.6395555032. The cubic root of 1851340 is about 122.7897348420.

It can be divided in two parts, 18 and 51340, that multiplied together give a triangular number (924120 = T₁₃₅₉).

The spelling of 1851340 in words is "one million, eight hundred fifty-one thousand, three hundred forty".