120312251 has 4 divisors (see below), whose sum is σ = 120335712. Its totient is φ = 120288792.

The previous prime is 120312239. The next prime is 120312259. The reversal of 120312251 is 152213021.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120312251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120312259) 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, 371 + ... + 15516.

It is an arithmetic number, because the mean of its divisors is an integer number (30083928).

Almost surely, 2^120312251 is an apocalyptic number.

120312251 is a deficient number, since it is larger than the sum of its proper divisors (23461).

120312251 is an equidigital number, since it uses as much as digits as its factorization.

120312251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23460.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 120312251 is about 10968.6941337609. The cubic root of 120312251 is about 493.6698649845.

Adding to 120312251 its reverse (152213021), we get a palindrome (272525272).

The spelling of 120312251 in words is "one hundred twenty million, three hundred twelve thousand, two hundred fifty-one".