121906487 has 8 divisors (see below), whose sum is σ = 124255440. Its totient is φ = 119568960.

The previous prime is 121906481. The next prime is 121906501. The reversal of 121906487 is 784609121.

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 121906487 - 2¹⁶ = 121840951 is a prime.

It is a super-2 number, since 2×121906487² = 29722383145362338, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121906487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121906481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20483 + ... + 25755.

It is an arithmetic number, because the mean of its divisors is an integer number (15531930).

Almost surely, 2^121906487 is an apocalyptic number.

121906487 is a deficient number, since it is larger than the sum of its proper divisors (2348953).

121906487 is an equidigital number, since it uses as much as digits as its factorization.

121906487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5713.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 121906487 is about 11041.1270710920. The cubic root of 121906487 is about 495.8408142803.

The spelling of 121906487 in words is "one hundred twenty-one million, nine hundred six thousand, four hundred eighty-seven".