120156013 has 4 divisors (see below), whose sum is σ = 120766140. Its totient is φ = 119545888.

The previous prime is 120156011. The next prime is 120156053. The reversal of 120156013 is 310651021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 310651021 = 2609 ⋅119069.

It can be written as a sum of positive squares in 2 ways, for example, as 57714409 + 62441604 = 7597^2 + 7902^2 .

It is a cyclic number.

It is not a de Polignac number, because 120156013 - 2¹ = 120156011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120156011) 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, 304768 + ... + 305161.

It is an arithmetic number, because the mean of its divisors is an integer number (30191535).

Almost surely, 2^120156013 is an apocalyptic number.

It is an amenable number.

120156013 is a deficient number, since it is larger than the sum of its proper divisors (610127).

120156013 is an equidigital number, since it uses as much as digits as its factorization.

120156013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610126.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 120156013 is about 10961.5698237068. The cubic root of 120156013 is about 493.4560784889.

The spelling of 120156013 in words is "one hundred twenty million, one hundred fifty-six thousand, thirteen".