1321455 has 16 divisors (see below), whose sum is σ = 2172384. Its totient is φ = 685440.

The previous prime is 1321451. The next prime is 1321457. The reversal of 1321455 is 5541231.

It is not a de Polignac number, because 1321455 - 2² = 1321451 is a prime.

1321455 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 636 + ... + 1745.

It is an arithmetic number, because the mean of its divisors is an integer number (135774).

2^1321455 is an apocalyptic number.

1321455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1321455 is a deficient number, since it is larger than the sum of its proper divisors (850929).

1321455 is a wasteful number, since it uses less digits than its factorization.

1321455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2426.

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

The square root of 1321455 is about 1149.5455623854. The cubic root of 1321455 is about 109.7364212665.

Adding to 1321455 its reverse (5541231), we get a palindrome (6862686).

The spelling of 1321455 in words is "one million, three hundred twenty-one thousand, four hundred fifty-five".