2545020 has 60 divisors (see below), whose sum is σ = 7988904. Its totient is φ = 678240.

The previous prime is 2545013. The next prime is 2545021. The reversal of 2545020 is 205452.

It is a tau number, because it is divible by the number of its divisors (60).

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

It is a junction number, because it is equal to n+sod(n) for n = 2544984 and 2545002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2545021) 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 19 ways as a sum of consecutive naturals, for example, 835 + ... + 2405.

2^2545020 is an apocalyptic number.

2545020 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 2545020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3994452).

2545020 is an abundant number, since it is smaller than the sum of its proper divisors (5443884).

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

2545020 is a wasteful number, since it uses less digits than its factorization.

2545020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592 (or 1581 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 2545020 is about 1595.3118817335. The cubic root of 2545020 is about 136.5307260863.

The spelling of 2545020 in words is "two million, five hundred forty-five thousand, twenty".