2109450 has 96 divisors (see below), whose sum is σ = 6249600. Its totient is φ = 470400.

The previous prime is 2109449. The next prime is 2109461. The reversal of 2109450 is 549012.

It is a Harshad number since it is a multiple of its sum of digits (21).

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

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51430 + ... + 51470.

It is an arithmetic number, because the mean of its divisors is an integer number (65100).

2^2109450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2109450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3124800).

2109450 is an abundant number, since it is smaller than the sum of its proper divisors (4140150).

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

2109450 is a wasteful number, since it uses less digits than its factorization.

2109450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 2109450 is about 1452.3945744873. The cubic root of 2109450 is about 128.2497159614.

The spelling of 2109450 in words is "two million, one hundred nine thousand, four hundred fifty".