121654 has 8 divisors (see below), whose sum is σ = 196560. Its totient is φ = 56136.

The previous prime is 121637. The next prime is 121661. The reversal of 121654 is 456121.

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

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2314 + ... + 2365.

It is an arithmetic number, because the mean of its divisors is an integer number (24570).

2¹²¹⁶⁵⁴ is an apocalyptic number.

121654 is a deficient number, since it is larger than the sum of its proper divisors (74906).

121654 is a wasteful number, since it uses less digits than its factorization.

121654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4694.

The product of its digits is 240, while the sum is 19.

The square root of 121654 is about 348.7893346993. The cubic root of 121654 is about 49.5498256927.

Adding to 121654 its reverse (456121), we get a palindrome (577775).

The spelling of 121654 in words is "one hundred twenty-one thousand, six hundred fifty-four".