2540837 has 8 divisors (see below), whose sum is σ = 2897496. Its totient is φ = 2207232.

The previous prime is 2540831. The next prime is 2540849. The reversal of 2540837 is 7380452.

It is a happy number.

It is a Cunningham number, because it is equal to 1594²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 376996 + 2163841 = 614^2 + 1471^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2540837 - 2⁴ = 2540821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540831) 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, 5528 + ... + 5969.

It is an arithmetic number, because the mean of its divisors is an integer number (362187).

2^2540837 is an apocalyptic number.

It is an amenable number.

2540837 is a deficient number, since it is larger than the sum of its proper divisors (356659).

2540837 is a wasteful number, since it uses less digits than its factorization.

2540837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11527.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 2540837 is about 1594.0003136763. Note that the first 3 decimals coincide. The cubic root of 2540837 is about 136.4558843425.

The spelling of 2540837 in words is "two million, five hundred forty thousand, eight hundred thirty-seven".