121136487 has 4 divisors (see below), whose sum is σ = 161515320. Its totient is φ = 80757656.

The previous prime is 121136453. The next prime is 121136489. The reversal of 121136487 is 784631121.

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

It is a cyclic number.

It is not a de Polignac number, because 121136487 - 2⁸ = 121136231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121136489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20189412 + ... + 20189417.

It is an arithmetic number, because the mean of its divisors is an integer number (40378830).

Almost surely, 2^121136487 is an apocalyptic number.

121136487 is a deficient number, since it is larger than the sum of its proper divisors (40378833).

121136487 is an equidigital number, since it uses as much as digits as its factorization.

121136487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40378832.

The product of its digits is 8064, while the sum is 33.

The square root of 121136487 is about 11006.2022060291. The cubic root of 121136487 is about 494.7946459692.

The spelling of 121136487 in words is "one hundred twenty-one million, one hundred thirty-six thousand, four hundred eighty-seven".