2543420 has 36 divisors (see below), whose sum is σ = 5876472. Its totient is φ = 924000.

The previous prime is 2543413. The next prime is 2543423. The reversal of 2543420 is 243452.

2543420 = T₃₇₆ + T₃₇₇ + ... + T₄₀₈.

It is a Smith number, since the sum of its digits (20) coincides with the sum of the digits of its prime factors.

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 = 2543392 and 2543401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543423) 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 11 ways as a sum of consecutive naturals, for example, 1895 + ... + 2945.

2^2543420 is an apocalyptic number.

2543420 is a gapful number since it is divisible by the number (20) 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 2543420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2938236).

2543420 is an abundant number, since it is smaller than the sum of its proper divisors (3333052).

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

2543420 is a wasteful number, since it uses less digits than its factorization.

2543420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082 (or 1069 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 2543420 is about 1594.8103335507. The cubic root of 2543420 is about 136.5021087662.

Adding to 2543420 its reverse (243452), we get a palindrome (2786872).

Subtracting from 2543420 its reverse (243452), we obtain a cube (2299968 = 132³).

The spelling of 2543420 in words is "two million, five hundred forty-three thousand, four hundred twenty".