2151205 has 8 divisors (see below), whose sum is σ = 2950272. Its totient is φ = 1475088.

The previous prime is 2151203. The next prime is 2151211. The reversal of 2151205 is 5021512.

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

It is a cyclic number.

It is not a de Polignac number, because 2151205 - 2¹ = 2151203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30697 + ... + 30766.

It is an arithmetic number, because the mean of its divisors is an integer number (368784).

2^2151205 is an apocalyptic number.

It is an amenable number.

2151205 is a deficient number, since it is larger than the sum of its proper divisors (799067).

2151205 is an equidigital number, since it uses as much as digits as its factorization.

2151205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61475.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 2151205 is about 1466.6986738932. The cubic root of 2151205 is about 129.0903959481.

Adding to 2151205 its reverse (5021512), we get a palindrome (7172717).

The spelling of 2151205 in words is "two million, one hundred fifty-one thousand, two hundred five".