120421087 has 4 divisors (see below), whose sum is σ = 120679416. Its totient is φ = 120162760.

The previous prime is 120421033. The next prime is 120421099. The reversal of 120421087 is 780124021.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120421087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120425087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128464 + ... + 129397.

It is an arithmetic number, because the mean of its divisors is an integer number (30169854).

Almost surely, 2^120421087 is an apocalyptic number.

120421087 is a deficient number, since it is larger than the sum of its proper divisors (258329).

120421087 is an equidigital number, since it uses as much as digits as its factorization.

120421087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258328.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 120421087 is about 10973.6542227282. The cubic root of 120421087 is about 493.8186801434.

The spelling of 120421087 in words is "one hundred twenty million, four hundred twenty-one thousand, eighty-seven".