2670321 has 4 divisors (see below), whose sum is σ = 3560432. Its totient is φ = 1780212.

The previous prime is 2670301. The next prime is 2670331. The reversal of 2670321 is 1230762.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2670321 - 2¹³ = 2662129 is a prime.

It is a super-2 number, since 2×2670321² = 14261228486082, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

2670321 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2670301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 445051 + ... + 445056.

It is an arithmetic number, because the mean of its divisors is an integer number (890108).

2^2670321 is an apocalyptic number.

It is an amenable number.

2670321 is a deficient number, since it is larger than the sum of its proper divisors (890111).

2670321 is an equidigital number, since it uses as much as digits as its factorization.

2670321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890110.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 2670321 is about 1634.1116852896. Note that the first 3 decimals coincide. The cubic root of 2670321 is about 138.7355702874.

The spelling of 2670321 in words is "two million, six hundred seventy thousand, three hundred twenty-one".