154481 has 4 divisors (see below), whose sum is σ = 155364. Its totient is φ = 153600.

The previous prime is 154459. The next prime is 154487. The reversal of 154481 is 184451.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 184451 = 67 ⋅2753.

It can be written as a sum of positive squares in 2 ways, for example, as 128881 + 25600 = 359^2 + 160^2 .

It is a cyclic number.

It is not a de Polignac number, because 154481 - 2⁶ = 154417 is a prime.

It is a super-2 number, since 2×154481² = 47728758722, which contains 22 as substring.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 154481.

It is not an unprimeable number, because it can be changed into a prime (154487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80 + ... + 561.

It is an arithmetic number, because the mean of its divisors is an integer number (38841).

2¹⁵⁴⁴⁸¹ is an apocalyptic number.

It is an amenable number.

154481 is a deficient number, since it is larger than the sum of its proper divisors (883).

154481 is an equidigital number, since it uses as much as digits as its factorization.

154481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882.

The product of its digits is 640, while the sum is 23.

The square root of 154481 is about 393.0407103596. The cubic root of 154481 is about 53.6568315675.

The spelling of 154481 in words is "one hundred fifty-four thousand, four hundred eighty-one".