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454 = 2227

454 has 4 divisors (see below), whose sum is σ = 684. Its totient is φ = 226.

The previous prime is 449. The next prime is 457.

454 = T2 + T3 + ... + T13.

454 is nontrivially palindromic in base 10 and base 11.

454 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

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

It is a super-2 number, since 2×4542 = 412232, which contains 22 as substring.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between even and odd.

454 is an undulating number in base 10 and base 11.

It is a plaindrome in base 13 and base 14.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112 + ... + 115.

It is an arithmetic number, because the mean of its divisors is an integer number (171).

454 is a deficient number, since it is larger than the sum of its proper divisors (230).

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

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

The sum of its prime factors is 229.

The product of its digits is 80, while the sum is 13.

The square root of 454 is about 21.3072757527. The cubic root of 454 is about 7.6857328434.

Subtracting from 454 its sum of digits (13), we obtain a square (441 = 212).

It can be divided in two parts, 45 and 4, that added together give a square (49 = 72).

The spelling of 454 in words is "four hundred fifty-four", and thus it is an aban number.

Divisors: 1 2 227 454