2190455 has 4 divisors (see below), whose sum is σ = 2628552. Its totient is φ = 1752360.

The previous prime is 2190439. The next prime is 2190469. The reversal of 2190455 is 5540912.

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

It is not a de Polignac number, because 2190455 - 2⁴ = 2190439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219041 + ... + 219050.

It is an arithmetic number, because the mean of its divisors is an integer number (657138).

2^2190455 is an apocalyptic number.

2190455 is a deficient number, since it is larger than the sum of its proper divisors (438097).

2190455 is an equidigital number, since it uses as much as digits as its factorization.

2190455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438096.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 2190455 is about 1480.0185809644. The cubic root of 2190455 is about 129.8707788935.

The spelling of 2190455 in words is "two million, one hundred ninety thousand, four hundred fifty-five".