121275398 has 4 divisors (see below), whose sum is σ = 181913100. Its totient is φ = 60637698.

The previous prime is 121275397. The next prime is 121275403. The reversal of 121275398 is 893572121.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121275391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30318848 + ... + 30318851.

It is an arithmetic number, because the mean of its divisors is an integer number (45478275).

Almost surely, 2^121275398 is an apocalyptic number.

121275398 is a deficient number, since it is larger than the sum of its proper divisors (60637702).

121275398 is an equidigital number, since it uses as much as digits as its factorization.

121275398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60637701.

The product of its digits is 30240, while the sum is 38.

The square root of 121275398 is about 11012.5109761580. The cubic root of 121275398 is about 494.9837058882.

The spelling of 121275398 in words is "one hundred twenty-one million, two hundred seventy-five thousand, three hundred ninety-eight".