1213455 has 8 divisors (see below), whose sum is σ = 1941552. Its totient is φ = 647168.

The previous prime is 1213451. The next prime is 1213469. The reversal of 1213455 is 5543121.

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 1213455 - 2² = 1213451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40434 + ... + 40463.

It is an arithmetic number, because the mean of its divisors is an integer number (242694).

2^1213455 is an apocalyptic number.

1213455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1213455 is a deficient number, since it is larger than the sum of its proper divisors (728097).

1213455 is an equidigital number, since it uses as much as digits as its factorization.

1213455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80905.

The product of its digits is 600, while the sum is 21.

The square root of 1213455 is about 1101.5693350852. The cubic root of 1213455 is about 106.6615503188.

Adding to 1213455 its reverse (5543121), we get a palindrome (6756576).

The spelling of 1213455 in words is "one million, two hundred thirteen thousand, four hundred fifty-five".