2541780 has 72 divisors (see below), whose sum is σ = 8010912. Its totient is φ = 676512.

The previous prime is 2541769. The next prime is 2541811. The reversal of 2541780 is 871452.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4599 + ... + 5121.

2^2541780 is an apocalyptic number.

2541780 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 2541780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4005456).

2541780 is an abundant number, since it is smaller than the sum of its proper divisors (5469132).

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

2541780 is a wasteful number, since it uses less digits than its factorization.

2541780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547 (or 533 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 2541780 is about 1594.2960829156. The cubic root of 2541780 is about 136.4727635550.

It can be divided in two parts, 2541 and 780, that added together give a triangular number (3321 = T₈₁).

The spelling of 2541780 in words is "two million, five hundred forty-one thousand, seven hundred eighty".