120251261 has 4 divisors (see below), whose sum is σ = 129501372. Its totient is φ = 111001152.

The previous prime is 120251249. The next prime is 120251269. The reversal of 120251261 is 162152021.

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 54479161 + 65772100 = 7381^2 + 8110^2 .

It is a cyclic number.

It is not a de Polignac number, because 120251261 - 2¹⁰ = 120250237 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120251269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4625036 + ... + 4625061.

It is an arithmetic number, because the mean of its divisors is an integer number (32375343).

Almost surely, 2^120251261 is an apocalyptic number.

It is an amenable number.

120251261 is a deficient number, since it is larger than the sum of its proper divisors (9250111).

120251261 is an equidigital number, since it uses as much as digits as its factorization.

120251261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9250110.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 120251261 is about 10965.9135962308. The cubic root of 120251261 is about 493.5864320452.

The spelling of 120251261 in words is "one hundred twenty million, two hundred fifty-one thousand, two hundred sixty-one".