2356945 has 4 divisors (see below), whose sum is σ = 2828340. Its totient is φ = 1885552.

The previous prime is 2356943. The next prime is 2356973. The reversal of 2356945 is 5496532.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1679616 + 677329 = 1296^2 + 823^2 .

It is a cyclic number.

It is not a de Polignac number, because 2356945 - 2¹ = 2356943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2356945.

It is not an unprimeable number, because it can be changed into a prime (2356943) 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, 235690 + ... + 235699.

It is an arithmetic number, because the mean of its divisors is an integer number (707085).

2^2356945 is an apocalyptic number.

It is an amenable number.

2356945 is a deficient number, since it is larger than the sum of its proper divisors (471395).

2356945 is an equidigital number, since it uses as much as digits as its factorization.

2356945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471394.

The product of its digits is 32400, while the sum is 34.

The square root of 2356945 is about 1535.2345097737. The cubic root of 2356945 is about 133.0811308941.

The spelling of 2356945 in words is "two million, three hundred fifty-six thousand, nine hundred forty-five".