45124220 has 48 divisors (see below), whose sum is σ = 99257088. Its totient is φ = 17210880.

The previous prime is 45124217. The next prime is 45124223. The reversal of 45124220 is 2242154.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (45124217) and next prime (45124223).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 45124192 and 45124201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45124223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44762 + ... + 45758.

It is an arithmetic number, because the mean of its divisors is an integer number (2067856).

Almost surely, 2^45124220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45124220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49628544).

45124220 is an abundant number, since it is smaller than the sum of its proper divisors (54132868).

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

45124220 is a wasteful number, since it uses less digits than its factorization.

45124220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110 (or 1108 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 45124220 is about 6717.4563638330. The cubic root of 45124220 is about 356.0163166363.

Adding to 45124220 its reverse (2242154), we get a palindrome (47366374).

The spelling of 45124220 in words is "forty-five million, one hundred twenty-four thousand, two hundred twenty".