145321444 has 12 divisors (see below), whose sum is σ = 256254768. Its totient is φ = 72105800.

The previous prime is 145321441. The next prime is 145321447. The reversal of 145321444 is 444123541.

145321444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (145321441) and next prime (145321447).

It is a super-2 number, since 2×145321444² = 42236644172490272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145321441) 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, 138142 + ... + 139189.

It is an arithmetic number, because the mean of its divisors is an integer number (21354564).

Almost surely, 2^145321444 is an apocalyptic number.

It is an amenable number.

145321444 is a deficient number, since it is larger than the sum of its proper divisors (110933324).

145321444 is a wasteful number, since it uses less digits than its factorization.

145321444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277466 (or 277464 counting only the distinct ones).

The product of its digits is 7680, while the sum is 28.

The square root of 145321444 is about 12054.9344253712. The cubic root of 145321444 is about 525.7467155117.

Adding to 145321444 its reverse (444123541), we get a palindrome (589444985).

The spelling of 145321444 in words is "one hundred forty-five million, three hundred twenty-one thousand, four hundred forty-four".