2051380 has 24 divisors (see below), whose sum is σ = 4352040. Its totient is φ = 812160.

The previous prime is 2051359. The next prime is 2051383. The reversal of 2051380 is 831502.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 443556 + 1607824 = 666^2 + 1268^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051383) 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, 1710 + ... + 2650.

It is an arithmetic number, because the mean of its divisors is an integer number (181335).

2^2051380 is an apocalyptic number.

2051380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2051380 is an abundant number, since it is smaller than the sum of its proper divisors (2300660).

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

2051380 is a wasteful number, since it uses less digits than its factorization.

2051380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059 (or 1057 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2051380 is about 1432.2639421559. The cubic root of 2051380 is about 127.0619079411.

Adding to 2051380 its reverse (831502), we get a palindrome (2882882).

The spelling of 2051380 in words is "two million, fifty-one thousand, three hundred eighty".