121880257 has 8 divisors (see below), whose sum is σ = 127228712. Its totient is φ = 116640000.

The previous prime is 121880219. The next prime is 121880263. The reversal of 121880257 is 752088121.

It can be written as a sum of positive squares in 4 ways, for example, as 3418801 + 118461456 = 1849^2 + 10884^2 .

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 121880257 - 2¹⁵ = 121847489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121830257) 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, 24744 + ... + 29257.

It is an arithmetic number, because the mean of its divisors is an integer number (15903589).

Almost surely, 2^121880257 is an apocalyptic number.

It is an amenable number.

121880257 is a deficient number, since it is larger than the sum of its proper divisors (5348455).

121880257 is an equidigital number, since it uses as much as digits as its factorization.

121880257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54099.

The product of its (nonzero) digits is 8960, while the sum is 34.

The square root of 121880257 is about 11039.9391755571. The cubic root of 121880257 is about 495.8052492124.

The spelling of 121880257 in words is "one hundred twenty-one million, eight hundred eighty thousand, two hundred fifty-seven".