120271561 has 4 divisors (see below), whose sum is σ = 121511572. Its totient is φ = 119031552.

The previous prime is 120271553. The next prime is 120271597. The reversal of 120271561 is 165172021.

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

It can be written as a sum of positive squares in 2 ways, for example, as 78216336 + 42055225 = 8844^2 + 6485^2 .

It is a cyclic number.

It is not a de Polignac number, because 120271561 - 2³ = 120271553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120271861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 619860 + ... + 620053.

It is an arithmetic number, because the mean of its divisors is an integer number (30377893).

Almost surely, 2^120271561 is an apocalyptic number.

It is an amenable number.

120271561 is a deficient number, since it is larger than the sum of its proper divisors (1240011).

120271561 is an equidigital number, since it uses as much as digits as its factorization.

120271561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240010.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 120271561 is about 10966.8391526456. The cubic root of 120271561 is about 493.6142051172.

The spelling of 120271561 in words is "one hundred twenty million, two hundred seventy-one thousand, five hundred sixty-one".