2154538 has 8 divisors (see below), whose sum is σ = 3238560. Its totient is φ = 1075020.

The previous prime is 2154533. The next prime is 2154539. The reversal of 2154538 is 8354512.

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

It is not an unprimeable number, because it can be changed into a prime (2154533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 603 + ... + 2161.

It is an arithmetic number, because the mean of its divisors is an integer number (404820).

2^2154538 is an apocalyptic number.

2154538 is a deficient number, since it is larger than the sum of its proper divisors (1084022).

2154538 is a wasteful number, since it uses less digits than its factorization.

2154538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2252.

The product of its digits is 4800, while the sum is 28.

The square root of 2154538 is about 1467.8344593312. The cubic root of 2154538 is about 129.1570308918.

It can be divided in two parts, 215 and 4538, that added together give a triangular number (4753 = T₉₇).

The spelling of 2154538 in words is "two million, one hundred fifty-four thousand, five hundred thirty-eight".