45221142 has 8 divisors (see below), whose sum is σ = 90442296. Its totient is φ = 15073712.

The previous prime is 45221117. The next prime is 45221149. The reversal of 45221142 is 24112254.

It is a sphenic number, since it is the product of 3 distinct primes.

45221142 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45221149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3768423 + ... + 3768434.

It is an arithmetic number, because the mean of its divisors is an integer number (11305287).

Almost surely, 2^45221142 is an apocalyptic number.

45221142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

45221142 is a wasteful number, since it uses less digits than its factorization.

45221142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7536862.

The product of its digits is 640, while the sum is 21.

The square root of 45221142 is about 6724.6666831896. Note that the first 4 decimals coincide. The cubic root of 45221142 is about 356.2710293526.

Adding to 45221142 its reverse (24112254), we get a palindrome (69333396).

The spelling of 45221142 in words is "forty-five million, two hundred twenty-one thousand, one hundred forty-two".