121270 has 16 divisors (see below), whose sum is σ = 222768. Its totient is φ = 47520.

The previous prime is 121267. The next prime is 121271. The reversal of 121270 is 72121.

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

It is a self number, because there is not a number n which added to its sum of digits gives 121270.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121271) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 580 + ... + 760.

It is an arithmetic number, because the mean of its divisors is an integer number (13923).

2¹²¹²⁷⁰ is an apocalyptic number.

121270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121270 is a deficient number, since it is larger than the sum of its proper divisors (101498).

121270 is a wasteful number, since it uses less digits than its factorization.

121270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255.

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 121270 is about 348.2384240718. The cubic root of 121270 is about 49.4976361827.

Adding to 121270 its reverse (72121), we get a palindrome (193391).

The spelling of 121270 in words is "one hundred twenty-one thousand, two hundred seventy", and thus it is an iban number.