1455 has 8 divisors (see below), whose sum is σ = 2352. Its totient is φ = 768.

The previous prime is 1453. The next prime is 1459. The reversal of 1455 is 5541.

1455 = 15² + 16² + ... + 19².

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1455 - 2¹ = 1453 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 97 = 1455 / (1 + 4 + 5 + 5).

1455 is a lucky number.

It is a plaindrome in base 4, base 10 and base 16.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1451) 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, 34 + ... + 63.

It is an arithmetic number, because the mean of its divisors is an integer number (294).

1455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1455 is a deficient number, since it is larger than the sum of its proper divisors (897).

1455 is an equidigital number, since it uses as much as digits as its factorization.

1455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105.

The product of its digits is 100, while the sum is 15.

The square root of 1455 is about 38.1444622455. The cubic root of 1455 is about 11.3315068183.

Adding to 1455 its reverse (5541), we get a palindrome (6996).

The spelling of 1455 in words is "one thousand, four hundred fifty-five".