2543634 has 24 divisors (see below), whose sum is σ = 5542992. Its totient is φ = 843000.

The previous prime is 2543633. The next prime is 2543641. The reversal of 2543634 is 4363452.

2543634 is a `hidden beast` number, since 25 + 4 + 3 + 634 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between even and odd.

It is a zygodrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 2543598 and 2543607.

It is not an unprimeable number, because it can be changed into a prime (2543633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4237 + ... + 4799.

It is an arithmetic number, because the mean of its divisors is an integer number (230958).

2^2543634 is an apocalyptic number.

2543634 is an abundant number, since it is smaller than the sum of its proper divisors (2999358).

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

2543634 is a wasteful number, since it uses less digits than its factorization.

2543634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822 (or 819 counting only the distinct ones).

The product of its digits is 8640, while the sum is 27.

The square root of 2543634 is about 1594.8774247572. The cubic root of 2543634 is about 136.5059370279.

The spelling of 2543634 in words is "two million, five hundred forty-three thousand, six hundred thirty-four".