121770145 has 64 divisors (see below), whose sum is σ = 186048000. Its totient is φ = 76204800.

The previous prime is 121770137. The next prime is 121770151. The reversal of 121770145 is 541077121.

It is not a de Polignac number, because 121770145 - 2³ = 121770137 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1205595 + ... + 1205695.

It is an arithmetic number, because the mean of its divisors is an integer number (2907000).

Almost surely, 2^121770145 is an apocalyptic number.

It is an amenable number.

121770145 is a deficient number, since it is larger than the sum of its proper divisors (64277855).

121770145 is a wasteful number, since it uses less digits than its factorization.

121770145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183 (or 169 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 28.

The square root of 121770145 is about 11034.9510646853. The cubic root of 121770145 is about 495.6558934482.

The spelling of 121770145 in words is "one hundred twenty-one million, seven hundred seventy thousand, one hundred forty-five".