2542140 has 72 divisors (see below), whose sum is σ = 7993440. Its totient is φ = 653184.

The previous prime is 2542139. The next prime is 2542147. The reversal of 2542140 is 412452.

2542140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2542147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4977 + ... + 5463.

It is an arithmetic number, because the mean of its divisors is an integer number (111020).

2^2542140 is an apocalyptic number.

2542140 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 2542140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3996720).

2542140 is an abundant number, since it is smaller than the sum of its proper divisors (5451300).

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

2542140 is a wasteful number, since it uses less digits than its factorization.

2542140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531 (or 526 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 2542140 is about 1594.4089814097. The cubic root of 2542140 is about 136.4792062678.

Adding to 2542140 its reverse (412452), we get a palindrome (2954592).

The spelling of 2542140 in words is "two million, five hundred forty-two thousand, one hundred forty".