120721634 has 8 divisors (see below), whose sum is σ = 197544528. Its totient is φ = 54873460.

The previous prime is 120721621. The next prime is 120721637. The reversal of 120721634 is 436127021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (120721637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2743652 + ... + 2743695.

It is an arithmetic number, because the mean of its divisors is an integer number (24693066).

Almost surely, 2^120721634 is an apocalyptic number.

120721634 is a deficient number, since it is larger than the sum of its proper divisors (76822894).

120721634 is a wasteful number, since it uses less digits than its factorization.

120721634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5487360.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 120721634 is about 10987.3397144168. The cubic root of 120721634 is about 494.2291631284.

Adding to 120721634 its reverse (436127021), we get a palindrome (556848655).

The spelling of 120721634 in words is "one hundred twenty million, seven hundred twenty-one thousand, six hundred thirty-four".