121252555 has 8 divisors (see below), whose sum is σ = 145663344. Its totient is φ = 96895200.

The previous prime is 121252553. The next prime is 121252559. The reversal of 121252555 is 555252121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121252555 - 2¹ = 121252553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121252553) 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, 8181 + ... + 17590.

It is an arithmetic number, because the mean of its divisors is an integer number (18207918).

Almost surely, 2^121252555 is an apocalyptic number.

121252555 is a deficient number, since it is larger than the sum of its proper divisors (24410789).

121252555 is an equidigital number, since it uses as much as digits as its factorization.

121252555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26717.

The product of its digits is 5000, while the sum is 28.

The square root of 121252555 is about 11011.4737887351. The cubic root of 121252555 is about 494.9526261502.

The spelling of 121252555 in words is "one hundred twenty-one million, two hundred fifty-two thousand, five hundred fifty-five".