2141780 has 12 divisors (see below), whose sum is σ = 4497780. Its totient is φ = 856704.

The previous prime is 2141753. The next prime is 2141791. The reversal of 2141780 is 871412.

It can be written as a sum of positive squares in 2 ways, for example, as 456976 + 1684804 = 676^2 + 1298^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53525 + ... + 53564.

It is an arithmetic number, because the mean of its divisors is an integer number (374815).

2^2141780 is an apocalyptic number.

2141780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2141780 is an abundant number, since it is smaller than the sum of its proper divisors (2356000).

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

2141780 is a wasteful number, since it uses less digits than its factorization.

2141780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107098 (or 107096 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 2141780 is about 1463.4821488491. The cubic root of 2141780 is about 128.9015935202.

The spelling of 2141780 in words is "two million, one hundred forty-one thousand, seven hundred eighty".