120042545 has 16 divisors (see below), whose sum is σ = 165500928. Its totient is φ = 81879360.

The previous prime is 120042539. The next prime is 120042557. The reversal of 120042545 is 545240021.

It is a happy number.

It is not a de Polignac number, because 120042545 - 2⁴ = 120042529 is a prime.

It is a super-2 number, since 2×120042545² = 28820425220154050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120042545.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2294 + ... + 15663.

It is an arithmetic number, because the mean of its divisors is an integer number (10343808).

Almost surely, 2^120042545 is an apocalyptic number.

It is an amenable number.

120042545 is a deficient number, since it is larger than the sum of its proper divisors (45458383).

120042545 is a wasteful number, since it uses less digits than its factorization.

120042545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18160.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 120042545 is about 10956.3928826964. The cubic root of 120042545 is about 493.3006996411.

Adding to 120042545 its reverse (545240021), we get a palindrome (665282566).

The spelling of 120042545 in words is "one hundred twenty million, forty-two thousand, five hundred forty-five".