45021582 has 72 divisors (see below), whose sum is σ = 104865696. Its totient is φ = 14486688.

The previous prime is 45021569. The next prime is 45021589. The reversal of 45021582 is 28512054.

It is a happy number.

45021582 is a `hidden beast` number, since 4 + 502 + 158 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45021589) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 616698 + ... + 616770.

It is an arithmetic number, because the mean of its divisors is an integer number (1456468).

Almost surely, 2^45021582 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45021582, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52432848).

45021582 is an abundant number, since it is smaller than the sum of its proper divisors (59844114).

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

45021582 is an frugal number, since it uses more digits than its factorization.

45021582 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 45021582 is about 6709.8123669742. The cubic root of 45021582 is about 355.7461842286.

It can be divided in two parts, 4502 and 1582, that added together give a square (6084 = 78²).

The spelling of 45021582 in words is "forty-five million, twenty-one thousand, five hundred eighty-two".