45451420 has 72 divisors (see below), whose sum is σ = 116922960. Its totient is φ = 14757120.

The previous prime is 45451403. The next prime is 45451423. The reversal of 45451420 is 2415454.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45451423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17400 + ... + 19840.

It is an arithmetic number, because the mean of its divisors is an integer number (1623930).

Almost surely, 2^45451420 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 45451420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58461480).

45451420 is an abundant number, since it is smaller than the sum of its proper divisors (71471540).

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

45451420 is a wasteful number, since it uses less digits than its factorization.

45451420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2483 (or 2474 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 45451420 is about 6741.7668307351. The cubic root of 45451420 is about 356.8747478076.

Adding to 45451420 its reverse (2415454), we get a palindrome (47866874).

The spelling of 45451420 in words is "forty-five million, four hundred fifty-one thousand, four hundred twenty".