2051345 has 8 divisors (see below), whose sum is σ = 2491776. Its totient is φ = 1620976.

The previous prime is 2051341. The next prime is 2051359. The reversal of 2051345 is 5431502.

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 2051345 - 2² = 2051341 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2051341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2057 + ... + 2886.

It is an arithmetic number, because the mean of its divisors is an integer number (311472).

2^2051345 is an apocalyptic number.

It is an amenable number.

2051345 is a deficient number, since it is larger than the sum of its proper divisors (440431).

2051345 is an equidigital number, since it uses as much as digits as its factorization.

2051345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5031.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 2051345 is about 1432.2517236855. The cubic root of 2051345 is about 127.0611853069.

Subtracting from 2051345 its sum of digits (20), we obtain a triangular number (2051325 = T₂₀₂₅).

Adding to 2051345 its reverse (5431502), we get a palindrome (7482847).

The spelling of 2051345 in words is "two million, fifty-one thousand, three hundred forty-five".