120531145 has 16 divisors (see below), whose sum is σ = 165489408. Its totient is φ = 82555200.

The previous prime is 120531143. The next prime is 120531157. The reversal of 120531145 is 541135021.

It is a happy number.

It is not a de Polignac number, because 120531145 - 2¹ = 120531143 is a prime.

It is a super-2 number, since 2×120531145² = 29055513830022050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (120531143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44212 + ... + 46858.

It is an arithmetic number, because the mean of its divisors is an integer number (10343088).

Almost surely, 2^120531145 is an apocalyptic number.

It is an amenable number.

120531145 is a deficient number, since it is larger than the sum of its proper divisors (44958263).

120531145 is a wasteful number, since it uses less digits than its factorization.

120531145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3960.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 120531145 is about 10978.6677242733. The cubic root of 120531145 is about 493.9690750309.

Adding to 120531145 its reverse (541135021), we get a palindrome (661666166).

The spelling of 120531145 in words is "one hundred twenty million, five hundred thirty-one thousand, one hundred forty-five".