1445623542 has 72 divisors (see below), whose sum is σ = 3453795072. Its totient is φ = 436671840.

The previous prime is 1445623541. The next prime is 1445623573. The reversal of 1445623542 is 2453265441.

1445623542 is a `hidden beast` number, since 1 + 44 + 56 + 23 + 542 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1445623497 and 1445623506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1445623541) 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, 833308 + ... + 835040.

It is an arithmetic number, because the mean of its divisors is an integer number (47969376).

Almost surely, 2^1445623542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1445623542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1726897536).

1445623542 is an abundant number, since it is smaller than the sum of its proper divisors (2008171530).

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

1445623542 is a wasteful number, since it uses less digits than its factorization.

1445623542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146 (or 2132 counting only the distinct ones).

The product of its digits is 115200, while the sum is 36.

The square root of 1445623542 is about 38021.3563934797. The cubic root of 1445623542 is about 1130.7113129233.

Adding to 1445623542 its reverse (2453265441), we get a palindrome (3898888983).

The spelling of 1445623542 in words is "one billion, four hundred forty-five million, six hundred twenty-three thousand, five hundred forty-two".