121376645 has 18 divisors (see below), whose sum is σ = 158135058. Its totient is φ = 89395488.

The previous prime is 121376621. The next prime is 121376699. The reversal of 121376645 is 546673121.

It can be written as a sum of positive squares in 3 ways, for example, as 574564 + 120802081 = 758^2 + 10991^2 .

It is not a de Polignac number, because 121376645 - 2⁶ = 121376581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 320066 + ... + 320444.

It is an arithmetic number, because the mean of its divisors is an integer number (8785281).

Almost surely, 2^121376645 is an apocalyptic number.

It is an amenable number.

121376645 is a deficient number, since it is larger than the sum of its proper divisors (36758413).

121376645 is an frugal number, since it uses more digits than its factorization.

121376645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789 (or 397 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 121376645 is about 11017.1069251415. The cubic root of 121376645 is about 495.1214136074.

The spelling of 121376645 in words is "one hundred twenty-one million, three hundred seventy-six thousand, six hundred forty-five".