154561 has 4 divisors (see below), whose sum is σ = 168624. Its totient is φ = 140500.

The previous prime is 154543. The next prime is 154571. The reversal of 154561 is 165451.

154561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is the 161-st star number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 154561 - 2¹³ = 146369 is a prime.

It is a Duffinian number.

154561 is a lucky number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (154501) 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, 7015 + ... + 7036.

It is an arithmetic number, because the mean of its divisors is an integer number (42156).

2¹⁵⁴⁵⁶¹ is an apocalyptic number.

154561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

154561 is a deficient number, since it is larger than the sum of its proper divisors (14063).

154561 is a wasteful number, since it uses less digits than its factorization.

154561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14062.

The product of its digits is 600, while the sum is 22.

The square root of 154561 is about 393.1424678154. The cubic root of 154561 is about 53.6660922657. Note that the first 3 decimals are identical.

The spelling of 154561 in words is "one hundred fifty-four thousand, five hundred sixty-one".