145521214 has 16 divisors (see below), whose sum is σ = 220106880. Its totient is φ = 72155160.

The previous prime is 145521191. The next prime is 145521221. The reversal of 145521214 is 412125541.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176407 + ... + 177229.

It is an arithmetic number, because the mean of its divisors is an integer number (13756680).

Almost surely, 2^145521214 is an apocalyptic number.

145521214 is a deficient number, since it is larger than the sum of its proper divisors (74585666).

145521214 is a wasteful number, since it uses less digits than its factorization.

145521214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1455.

The product of its digits is 1600, while the sum is 25.

The square root of 145521214 is about 12063.2173983560. The cubic root of 145521214 is about 525.9875157875.

Adding to 145521214 its reverse (412125541), we get a palindrome (557646755).

The spelling of 145521214 in words is "one hundred forty-five million, five hundred twenty-one thousand, two hundred fourteen".