45120145 has 32 divisors (see below), whose sum is σ = 63922176. Its totient is φ = 29937600.

The previous prime is 45120113. The next prime is 45120149. The reversal of 45120145 is 54102154.

It is not a de Polignac number, because 45120145 - 2⁵ = 45120113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45120149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166360 + ... + 166630.

It is an arithmetic number, because the mean of its divisors is an integer number (1997568).

Almost surely, 2^45120145 is an apocalyptic number.

It is an amenable number.

45120145 is a deficient number, since it is larger than the sum of its proper divisors (18802031).

45120145 is a wasteful number, since it uses less digits than its factorization.

45120145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 45120145 is about 6717.1530427704. The cubic root of 45120145 is about 356.0055994785.

Adding to 45120145 its reverse (54102154), we get a palindrome (99222299).

Subtracting 45120145 from its reverse (54102154), we obtain a square (8982009 = 2997²).

The spelling of 45120145 in words is "forty-five million, one hundred twenty thousand, one hundred forty-five".