120451409 has 8 divisors (see below), whose sum is σ = 137347560. Its totient is φ = 104645376.

The previous prime is 120451381. The next prime is 120451433. The reversal of 120451409 is 904154021.

It can be written as a sum of positive squares in 4 ways, for example, as 784 + 120450625 = 28^2 + 10975^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120451409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120451109) 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, 272294 + ... + 272735.

It is an arithmetic number, because the mean of its divisors is an integer number (17168445).

Almost surely, 2^120451409 is an apocalyptic number.

It is an amenable number.

120451409 is a deficient number, since it is larger than the sum of its proper divisors (16896151).

120451409 is a wasteful number, since it uses less digits than its factorization.

120451409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545059.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 120451409 is about 10975.0357174817. The cubic root of 120451409 is about 493.8601244723.

The spelling of 120451409 in words is "one hundred twenty million, four hundred fifty-one thousand, four hundred nine".