2121854 has 8 divisors (see below), whose sum is σ = 3637488. Its totient is φ = 909360.

The previous prime is 2121853. The next prime is 2121869. The reversal of 2121854 is 4581212.

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

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75767 + ... + 75794.

It is an arithmetic number, because the mean of its divisors is an integer number (454686).

2^2121854 is an apocalyptic number.

2121854 is a deficient number, since it is larger than the sum of its proper divisors (1515634).

2121854 is a wasteful number, since it uses less digits than its factorization.

2121854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151570.

The product of its digits is 640, while the sum is 23.

The square root of 2121854 is about 1456.6585049352. The cubic root of 2121854 is about 128.5006030848.

The spelling of 2121854 in words is "two million, one hundred twenty-one thousand, eight hundred fifty-four".