121280845 has 24 divisors (see below), whose sum is σ = 168690816. Its totient is φ = 81998688.

The previous prime is 121280837. The next prime is 121280891. The reversal of 121280845 is 548082121.

It is not a de Polignac number, because 121280845 - 2³ = 121280837 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 240864 + ... + 241366.

It is an arithmetic number, because the mean of its divisors is an integer number (7028784).

Almost surely, 2^121280845 is an apocalyptic number.

It is an amenable number.

121280845 is a deficient number, since it is larger than the sum of its proper divisors (47409971).

121280845 is an frugal number, since it uses more digits than its factorization.

121280845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681 (or 598 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 31.

The square root of 121280845 is about 11012.7582830098. The cubic root of 121280845 is about 494.9911163933.

The spelling of 121280845 in words is "one hundred twenty-one million, two hundred eighty thousand, eight hundred forty-five".