121560 has 32 divisors (see below), whose sum is σ = 365040. Its totient is φ = 32384.

The previous prime is 121559. The next prime is 121571. The reversal of 121560 is 65121.

It is a hoax number, since the sum of its digits (15) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (15).

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 121560.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 387 + ... + 626.

2¹²¹⁵⁶⁰ is an apocalyptic number.

121560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121560 is an abundant number, since it is smaller than the sum of its proper divisors (243480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121560 is a wasteful number, since it uses less digits than its factorization.

121560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027 (or 1023 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 121560 is about 348.6545568324. The cubic root of 121560 is about 49.5370602985.

Adding to 121560 its reverse (65121), we get a palindrome (186681).

It can be divided in two parts, 1215 and 60, that multiplied together give a square (72900 = 270²).

The spelling of 121560 in words is "one hundred twenty-one thousand, five hundred sixty".