120115645 has 8 divisors (see below), whose sum is σ = 155226456. Its totient is φ = 88700736.

The previous prime is 120115621. The next prime is 120115661. The reversal of 120115645 is 546511021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6095961 + 114019684 = 2469^2 + 10678^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120115645 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 923902 + ... + 924031.

It is an arithmetic number, because the mean of its divisors is an integer number (19403307).

Almost surely, 2^120115645 is an apocalyptic number.

It is an amenable number.

120115645 is a deficient number, since it is larger than the sum of its proper divisors (35110811).

120115645 is a wasteful number, since it uses less digits than its factorization.

120115645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1847951.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 120115645 is about 10959.7283269249. The cubic root of 120115645 is about 493.4008112695.

Adding to 120115645 its reverse (546511021), we get a palindrome (666626666).

The spelling of 120115645 in words is "one hundred twenty million, one hundred fifteen thousand, six hundred forty-five".