121343145 has 64 divisors (see below), whose sum is σ = 249937920. Its totient is φ = 48787200.

The previous prime is 121343141. The next prime is 121343171. The reversal of 121343145 is 541343121.

It is a happy number.

It is not a de Polignac number, because 121343145 - 2² = 121343141 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121343141) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 34111 + ... + 37499.

It is an arithmetic number, because the mean of its divisors is an integer number (3905280).

Almost surely, 2^121343145 is an apocalyptic number.

121343145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121343145 is an abundant number, since it is smaller than the sum of its proper divisors (128594775).

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

121343145 is a wasteful number, since it uses less digits than its factorization.

121343145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3446.

The product of its digits is 1440, while the sum is 24.

The square root of 121343145 is about 11015.5864573794. The cubic root of 121343145 is about 495.0758581834.

Subtracting from 121343145 its sum of digits (24), we obtain a palindrome (121343121).

Adding to 121343145 its reverse (541343121), we get a palindrome (662686266).

The spelling of 121343145 in words is "one hundred twenty-one million, three hundred forty-three thousand, one hundred forty-five".