121137587 has 8 divisors (see below), whose sum is σ = 124282704. Its totient is φ = 118032768.

The previous prime is 121137571. The next prime is 121137607. The reversal of 121137587 is 785731121.

It is a happy number.

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 121137587 - 2⁴ = 121137571 is a prime.

It is a super-3 number, since 3×121137587³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121137517) 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, 3938 + ... + 16055.

It is an arithmetic number, because the mean of its divisors is an integer number (15535338).

Almost surely, 2^121137587 is an apocalyptic number.

121137587 is a deficient number, since it is larger than the sum of its proper divisors (3145117).

121137587 is an equidigital number, since it uses as much as digits as its factorization.

121137587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20149.

The product of its digits is 11760, while the sum is 35.

The square root of 121137587 is about 11006.2521777397. The cubic root of 121137587 is about 494.7961436530.

The spelling of 121137587 in words is "one hundred twenty-one million, one hundred thirty-seven thousand, five hundred eighty-seven".