2355645 has 16 divisors (see below), whose sum is σ = 3810240. Its totient is φ = 1242624.

The previous prime is 2355629. The next prime is 2355671. The reversal of 2355645 is 5465532.

It is not a de Polignac number, because 2355645 - 2⁴ = 2355629 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 646 + ... + 2264.

It is an arithmetic number, because the mean of its divisors is an integer number (238140).

2^2355645 is an apocalyptic number.

It is an amenable number.

2355645 is a deficient number, since it is larger than the sum of its proper divisors (1454595).

2355645 is a wasteful number, since it uses less digits than its factorization.

2355645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1724.

The product of its digits is 18000, while the sum is 30.

The square root of 2355645 is about 1534.8110632909. The cubic root of 2355645 is about 133.0566589205.

The spelling of 2355645 in words is "two million, three hundred fifty-five thousand, six hundred forty-five".