120571409 has 6 divisors (see below), whose sum is σ = 140256594. Its totient is φ = 103346880.

The previous prime is 120571351. The next prime is 120571421. The reversal of 120571409 is 904175021.

It can be written as a sum of positive squares in only one way, i.e., 70090384 + 50481025 = 8372^2 + 7105^2 .

It is a de Polignac number, because none of the positive numbers 2^k-120571409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (120571469) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1230272 + ... + 1230369.

It is an arithmetic number, because the mean of its divisors is an integer number (23376099).

Almost surely, 2^120571409 is an apocalyptic number.

It is an amenable number.

120571409 is a deficient number, since it is larger than the sum of its proper divisors (19685185).

120571409 is an equidigital number, since it uses as much as digits as its factorization.

120571409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2460655 (or 2460648 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 120571409 is about 10980.5013091389. The cubic root of 120571409 is about 494.0240731438.

The spelling of 120571409 in words is "one hundred twenty million, five hundred seventy-one thousand, four hundred nine".