121944145 has 8 divisors (see below), whose sum is σ = 154940904. Its totient is φ = 91816704.

The previous prime is 121944143. The next prime is 121944161. The reversal of 121944145 is 541449121.

It can be written as a sum of positive squares in 4 ways, for example, as 1449616 + 120494529 = 1204^2 + 10977^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121944145 - 2¹ = 121944143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121944143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 717234 + ... + 717403.

It is an arithmetic number, because the mean of its divisors is an integer number (19367613).

Almost surely, 2^121944145 is an apocalyptic number.

It is an amenable number.

121944145 is a deficient number, since it is larger than the sum of its proper divisors (32996759).

121944145 is a wasteful number, since it uses less digits than its factorization.

121944145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1434659.

The product of its digits is 5760, while the sum is 31.

The square root of 121944145 is about 11042.8322906762. The cubic root of 121944145 is about 495.8918655724.

The spelling of 121944145 in words is "one hundred twenty-one million, nine hundred forty-four thousand, one hundred forty-five".