2545520 has 40 divisors (see below), whose sum is σ = 6053184. Its totient is φ = 995072.

The previous prime is 2545519. The next prime is 2545523. The reversal of 2545520 is 255452.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2545523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3422 + ... + 4098.

2^2545520 is an apocalyptic number.

2545520 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 2545520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3026592).

2545520 is an abundant number, since it is smaller than the sum of its proper divisors (3507664).

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

2545520 is a wasteful number, since it uses less digits than its factorization.

2545520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737 (or 731 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 23.

The square root of 2545520 is about 1595.4685832068. The cubic root of 2545520 is about 136.5396665390.

The spelling of 2545520 in words is "two million, five hundred forty-five thousand, five hundred twenty".