1212455 has 4 divisors (see below), whose sum is σ = 1454952. Its totient is φ = 969960.

The previous prime is 1212443. The next prime is 1212473. The reversal of 1212455 is 5542121.

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

It is not a de Polignac number, because 1212455 - 2⁴ = 1212439 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121241 + ... + 121250.

It is an arithmetic number, because the mean of its divisors is an integer number (363738).

2^1212455 is an apocalyptic number.

1212455 is a deficient number, since it is larger than the sum of its proper divisors (242497).

1212455 is an equidigital number, since it uses as much as digits as its factorization.

1212455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242496.

The product of its digits is 400, while the sum is 20.

The square root of 1212455 is about 1101.1153436403. The cubic root of 1212455 is about 106.6322425809.

Adding to 1212455 its reverse (5542121), we get a palindrome (6754576).

The spelling of 1212455 in words is "one million, two hundred twelve thousand, four hundred fifty-five".