120242981 has 4 divisors (see below), whose sum is σ = 120980832. Its totient is φ = 119505132.

The previous prime is 120242959. The next prime is 120242987. The reversal of 120242981 is 189242021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 189242021 = 3917 ⋅48313.

It is a cyclic number.

It is not a de Polignac number, because 120242981 - 2⁶ = 120242917 is a prime.

It is a super-2 number, since 2×120242981² = 28916748959532722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120242987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368681 + ... + 369006.

It is an arithmetic number, because the mean of its divisors is an integer number (30245208).

Almost surely, 2^120242981 is an apocalyptic number.

It is an amenable number.

120242981 is a deficient number, since it is larger than the sum of its proper divisors (737851).

120242981 is an equidigital number, since it uses as much as digits as its factorization.

120242981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737850.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 120242981 is about 10965.5360562081. The cubic root of 120242981 is about 493.5751030179.

The spelling of 120242981 in words is "one hundred twenty million, two hundred forty-two thousand, nine hundred eighty-one".