2123455 has 8 divisors (see below), whose sum is σ = 2556000. Its totient is φ = 1693536.

The previous prime is 2123423. The next prime is 2123461. The reversal of 2123455 is 5543212.

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 2123455 - 2⁵ = 2123423 is a prime.

It is a super-2 number, since 2×2123455² = 9018122274050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2641 + ... + 3349.

It is an arithmetic number, because the mean of its divisors is an integer number (319500).

2^2123455 is an apocalyptic number.

2123455 is a deficient number, since it is larger than the sum of its proper divisors (432545).

2123455 is an equidigital number, since it uses as much as digits as its factorization.

2123455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1313.

The product of its digits is 1200, while the sum is 22.

The square root of 2123455 is about 1457.2079467255. The cubic root of 2123455 is about 128.5329140959.

Adding to 2123455 its reverse (5543212), we get a palindrome (7666667).

The spelling of 2123455 in words is "two million, one hundred twenty-three thousand, four hundred fifty-five".