2540531 has 16 divisors (see below), whose sum is σ = 3162816. Its totient is φ = 1990656.

The previous prime is 2540519. The next prime is 2540533. The reversal of 2540531 is 1350452.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2540531 is a prime.

It is a super-2 number, since 2×2540531² = 12908595523922, which contains 22 as substring.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4115 + ... + 4691.

It is an arithmetic number, because the mean of its divisors is an integer number (197676).

2^2540531 is an apocalyptic number.

2540531 is a deficient number, since it is larger than the sum of its proper divisors (622285).

2540531 is a wasteful number, since it uses less digits than its factorization.

2540531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 2540531 is about 1593.9043258615. The cubic root of 2540531 is about 136.4504062032.

Adding to 2540531 its reverse (1350452), we get a palindrome (3890983).

The spelling of 2540531 in words is "two million, five hundred forty thousand, five hundred thirty-one".