121478 has 8 divisors (see below), whose sum is σ = 208272. Its totient is φ = 52056.

The previous prime is 121469. The next prime is 121487. The reversal of 121478 is 874121.

It is an interprime number because it is at equal distance from previous prime (121469) and next prime (121487).

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 inconsummate number, since it does not exist a number n which divided by its sum of digits gives 121478.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4325 + ... + 4352.

It is an arithmetic number, because the mean of its divisors is an integer number (26034).

2¹²¹⁴⁷⁸ is an apocalyptic number.

121478 is a deficient number, since it is larger than the sum of its proper divisors (86794).

121478 is an equidigital number, since it uses as much as digits as its factorization.

121478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8686.

The product of its digits is 448, while the sum is 23.

The square root of 121478 is about 348.5369420879. The cubic root of 121478 is about 49.5259191538.

Adding to 121478 its reverse (874121), we get a palindrome (995599).

The spelling of 121478 in words is "one hundred twenty-one thousand, four hundred seventy-eight".