2640135 has 32 divisors (see below), whose sum is σ = 4465152. Its totient is φ = 1330560.

The previous prime is 2640067. The next prime is 2640137. The reversal of 2640135 is 5310462.

It is a happy number.

It is not a de Polignac number, because 2640135 - 2¹⁰ = 2639111 is a prime.

It is a super-3 number, since 3×2640135³ = 55207700497033381125, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37150 + ... + 37220.

It is an arithmetic number, because the mean of its divisors is an integer number (139536).

2^2640135 is an apocalyptic number.

2640135 is a deficient number, since it is larger than the sum of its proper divisors (1825017).

2640135 is a wasteful number, since it uses less digits than its factorization.

2640135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 2640135 is about 1624.8492237743. The cubic root of 2640135 is about 138.2108203862.

Adding to 2640135 its reverse (5310462), we get a palindrome (7950597).

It can be divided in two parts, 2640 and 135, that added together give a triangular number (2775 = T₇₄).

The spelling of 2640135 in words is "two million, six hundred forty thousand, one hundred thirty-five".