121520254 has 4 divisors (see below), whose sum is σ = 182280384. Its totient is φ = 60760126.

The previous prime is 121520251. The next prime is 121520261. The reversal of 121520254 is 452025121.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121520251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30380062 + ... + 30380065.

It is an arithmetic number, because the mean of its divisors is an integer number (45570096).

Almost surely, 2^121520254 is an apocalyptic number.

121520254 is a deficient number, since it is larger than the sum of its proper divisors (60760130).

121520254 is an equidigital number, since it uses as much as digits as its factorization.

121520254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60760129.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 121520254 is about 11023.6225443363. The cubic root of 121520254 is about 495.3166073007.

Adding to 121520254 its reverse (452025121), we get a palindrome (573545375).

The spelling of 121520254 in words is "one hundred twenty-one million, five hundred twenty thousand, two hundred fifty-four".