2642540 has 24 divisors (see below), whose sum is σ = 5700912. Its totient is φ = 1028160.

The previous prime is 2642537. The next prime is 2642543. The reversal of 2642540 is 452462.

It is an interprime number because it is at equal distance from previous prime (2642537) and next prime (2642543).

It is not an unprimeable number, because it can be changed into a prime (2642543) 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, 1046 + ... + 2525.

It is an arithmetic number, because the mean of its divisors is an integer number (237538).

2^2642540 is an apocalyptic number.

2642540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2642540 is an abundant number, since it is smaller than the sum of its proper divisors (3058372).

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

2642540 is a wasteful number, since it uses less digits than its factorization.

2642540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3617 (or 3615 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 2642540 is about 1625.5891239794. The cubic root of 2642540 is about 138.2527748245.

The spelling of 2642540 in words is "two million, six hundred forty-two thousand, five hundred forty".