120731545 has 8 divisors (see below), whose sum is σ = 158048640. Its totient is φ = 87804720.

The previous prime is 120731543. The next prime is 120731557. The reversal of 120731545 is 545137021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 120731545 - 2¹ = 120731543 is a prime.

It is a super-2 number, since 2×120731545² = 29152211916174050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (120731543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1097505 + ... + 1097614.

It is an arithmetic number, because the mean of its divisors is an integer number (19756080).

Almost surely, 2^120731545 is an apocalyptic number.

It is an amenable number.

120731545 is a deficient number, since it is larger than the sum of its proper divisors (37317095).

120731545 is a wasteful number, since it uses less digits than its factorization.

120731545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2195135.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 120731545 is about 10987.7907242539. The cubic root of 120731545 is about 494.2426878272.

Adding to 120731545 its reverse (545137021), we get a palindrome (665868566).

The spelling of 120731545 in words is "one hundred twenty million, seven hundred thirty-one thousand, five hundred forty-five".