2251340 has 48 divisors (see below), whose sum is σ = 5823552. Its totient is φ = 711936.

The previous prime is 2251331. The next prime is 2251343. The reversal of 2251340 is 431522.

2251340 = 221² + 222² + ... + 259².

It is not an unprimeable number, because it can be changed into a prime (2251343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1202 + ... + 2438.

It is an arithmetic number, because the mean of its divisors is an integer number (121324).

2^2251340 is an apocalyptic number.

2251340 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 2251340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2911776).

2251340 is an abundant number, since it is smaller than the sum of its proper divisors (3572212).

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

2251340 is a wasteful number, since it uses less digits than its factorization.

2251340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266 (or 1264 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 2251340 is about 1500.4466001828. The cubic root of 2251340 is about 131.0630778330.

Adding to 2251340 its reverse (431522), we get a palindrome (2682862).

The spelling of 2251340 in words is "two million, two hundred fifty-one thousand, three hundred forty".