1814420 has 24 divisors (see below), whose sum is σ = 3835944. Its totient is φ = 720896.

The previous prime is 1814413. The next prime is 1814429. The reversal of 1814420 is 244181.

It can be written as a sum of positive squares in 4 ways, for example, as 586756 + 1227664 = 766^2 + 1108^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1814392 and 1814401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1814429) 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, 4964 + ... + 5316.

It is an arithmetic number, because the mean of its divisors is an integer number (159831).

2^1814420 is an apocalyptic number.

1814420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1814420 is an abundant number, since it is smaller than the sum of its proper divisors (2021524).

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

1814420 is a wasteful number, since it uses less digits than its factorization.

1814420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619 (or 617 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 1814420 is about 1347.0040831415. The cubic root of 1814420 is about 121.9680109627.

It can be divided in two parts, 18 and 14420, that multiplied together give a triangular number (259560 = T₇₂₀).

The spelling of 1814420 in words is "one million, eight hundred fourteen thousand, four hundred twenty".