121425587 has 4 divisors (see below), whose sum is σ = 121564296. Its totient is φ = 121286880.

The previous prime is 121425583. The next prime is 121425617. The reversal of 121425587 is 785524121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 785524121 = 1151 ⋅682471.

It is a cyclic number.

It is not a de Polignac number, because 121425587 - 2² = 121425583 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121425583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68033 + ... + 69794.

It is an arithmetic number, because the mean of its divisors is an integer number (30391074).

Almost surely, 2^121425587 is an apocalyptic number.

121425587 is a deficient number, since it is larger than the sum of its proper divisors (138709).

121425587 is an equidigital number, since it uses as much as digits as its factorization.

121425587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138708.

The product of its digits is 22400, while the sum is 35.

The square root of 121425587 is about 11019.3278833148. The cubic root of 121425587 is about 495.1879529759.

The spelling of 121425587 in words is "one hundred twenty-one million, four hundred twenty-five thousand, five hundred eighty-seven".