45120017 has 4 divisors (see below), whose sum is σ = 45291840. Its totient is φ = 44948196.

The previous prime is 45120007. The next prime is 45120037. The reversal of 45120017 is 71002154.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71002154 = 2 ⋅35501077.

It is a cyclic number.

It is not a de Polignac number, because 45120017 - 2⁴ = 45120001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45120007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85517 + ... + 86042.

It is an arithmetic number, because the mean of its divisors is an integer number (11322960).

Almost surely, 2^45120017 is an apocalyptic number.

It is an amenable number.

45120017 is a deficient number, since it is larger than the sum of its proper divisors (171823).

45120017 is a wasteful number, since it uses less digits than its factorization.

45120017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171822.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 45120017 is about 6717.1435149176. The cubic root of 45120017 is about 356.0052628309.

The spelling of 45120017 in words is "forty-five million, one hundred twenty thousand, seventeen".