2121354 has 24 divisors (see below), whose sum is σ = 4667520. Its totient is φ = 696168.

The previous prime is 2121341. The next prime is 2121367. The reversal of 2121354 is 4531212.

It is an interprime number because it is at equal distance from previous prime (2121341) and next prime (2121367).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 327 + ... + 2085.

It is an arithmetic number, because the mean of its divisors is an integer number (194480).

2^2121354 is an apocalyptic number.

2121354 is an abundant number, since it is smaller than the sum of its proper divisors (2546166).

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

2121354 is a wasteful number, since it uses less digits than its factorization.

2121354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1834 (or 1831 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 2121354 is about 1456.4868691478. The cubic root of 2121354 is about 128.4905088702.

Adding to 2121354 its reverse (4531212), we get a palindrome (6652566).

The spelling of 2121354 in words is "two million, one hundred twenty-one thousand, three hundred fifty-four".