120645645 has 16 divisors (see below), whose sum is σ = 199260672. Its totient is φ = 62268480.

The previous prime is 120645631. The next prime is 120645653. The reversal of 120645645 is 546546021.

It is not a de Polignac number, because 120645645 - 2¹⁹ = 120121357 is a prime.

It is a super-3 number, since 3×120645645³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

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, 129262 + ... + 130191.

It is an arithmetic number, because the mean of its divisors is an integer number (12453792).

Almost surely, 2^120645645 is an apocalyptic number.

120645645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

120645645 is a deficient number, since it is larger than the sum of its proper divisors (78615027).

120645645 is a wasteful number, since it uses less digits than its factorization.

120645645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259492.

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 120645645 is about 10983.8811446592. The cubic root of 120645645 is about 494.1254428000.

The spelling of 120645645 in words is "one hundred twenty million, six hundred forty-five thousand, six hundred forty-five".