145321416 has 48 divisors (see below), whose sum is σ = 397211100. Its totient is φ = 47993472.

The previous prime is 145321403. The next prime is 145321427. The reversal of 145321416 is 614123541.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 145298916 + 22500 = 12054^2 + 150^2 .

It is a super-2 number, since 2×145321416² = 42236627896490112, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145321416.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1411 + ... + 17106.

Almost surely, 2^145321416 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 145321416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198605550).

145321416 is an abundant number, since it is smaller than the sum of its proper divisors (251889684).

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

145321416 is a wasteful number, since it uses less digits than its factorization.

145321416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18638 (or 18631 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 145321416 is about 12054.9332640210. The cubic root of 145321416 is about 525.7466817454.

Adding to 145321416 its reverse (614123541), we get a palindrome (759444957).

The spelling of 145321416 in words is "one hundred forty-five million, three hundred twenty-one thousand, four hundred sixteen".