2545240 has 64 divisors (see below), whose sum is σ = 6415200. Its totient is φ = 903168.

The previous prime is 2545237. The next prime is 2545241. The reversal of 2545240 is 425452.

2545240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2545241) 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 15 ways as a sum of consecutive naturals, for example, 12822 + ... + 13018.

2^2545240 is an apocalyptic number.

2545240 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 2545240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3207600).

2545240 is an abundant number, since it is smaller than the sum of its proper divisors (3869960).

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

2545240 is a wasteful number, since it uses less digits than its factorization.

2545240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 240 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 2545240 is about 1595.3808322780. The cubic root of 2545240 is about 136.5346600298.

Subtracting from 2545240 its product of nonzero digits (1600), we obtain a triangular number (2543640 = T₂₂₅₅).

The spelling of 2545240 in words is "two million, five hundred forty-five thousand, two hundred forty".