45123102 has 64 divisors (see below), whose sum is σ = 106997760. Its totient is φ = 14062752.

The previous prime is 45123059. The next prime is 45123107. The reversal of 45123102 is 20132154.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45123107) 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 31 ways as a sum of consecutive naturals, for example, 57988 + ... + 58760.

It is an arithmetic number, because the mean of its divisors is an integer number (1671840).

Almost surely, 2^45123102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45123102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53498880).

45123102 is an abundant number, since it is smaller than the sum of its proper divisors (61874658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

45123102 is a wasteful number, since it uses less digits than its factorization.

45123102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854 (or 848 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 45123102 is about 6717.3731472950. The cubic root of 45123102 is about 356.0133763858.

Adding to 45123102 its reverse (20132154), we get a palindrome (65255256).

The spelling of 45123102 in words is "forty-five million, one hundred twenty-three thousand, one hundred two".