121485 has 32 divisors (see below), whose sum is σ = 241920. Its totient is φ = 50688.

The previous prime is 121469. The next prime is 121487. The reversal of 121485 is 584121.

121485 = T₁ + T₂ + ... + T₈₉.

121485 is a nontrivial binomial coefficient, being equal to C(91, 3).

It is not a de Polignac number, because 121485 - 2⁴ = 121469 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121487) by changing a digit.

It is the 89-th tetrahedral number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1321 + ... + 1409.

It is an arithmetic number, because the mean of its divisors is an integer number (7560).

2¹²¹⁴⁸⁵ is an apocalyptic number.

121485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121485 is a deficient number, since it is larger than the sum of its proper divisors (120435).

121485 is a wasteful number, since it uses less digits than its factorization.

121485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117.

The product of its digits is 320, while the sum is 21.

The square root of 121485 is about 348.5469839204. The cubic root of 121485 is about 49.5268704228.

It can be divided in two parts, 121 and 485, that multiplied together give a palindrome (58685).

The spelling of 121485 in words is "one hundred twenty-one thousand, four hundred eighty-five".