145004401 has 2 divisors, whose sum is σ = 145004402. Its totient is φ = 145004400.

The previous prime is 145004393. The next prime is 145004423. The reversal of 145004401 is 104400541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143041600 + 1962801 = 11960^2 + 1401^2 .

It is a cyclic number.

It is not a de Polignac number, because 145004401 - 2³ = 145004393 is a prime.

It is not a weakly prime, because it can be changed into another prime (145004491) by changing a digit.

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 as a sum of consecutive naturals, namely, 72502200 + 72502201.

It is an arithmetic number, because the mean of its divisors is an integer number (72502201).

Almost surely, 2^145004401 is an apocalyptic number.

It is an amenable number.

145004401 is a deficient number, since it is larger than the sum of its proper divisors (1).

145004401 is an equidigital number, since it uses as much as digits as its factorization.

145004401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 145004401 is about 12041.7773189841. Note that the first 3 decimals coincide. The cubic root of 145004401 is about 525.3641023772.

Adding to 145004401 its reverse (104400541), we get a palindrome (249404942).

The spelling of 145004401 in words is "one hundred forty-five million, four thousand, four hundred one".