145004402 has 4 divisors (see below), whose sum is σ = 217506606. Its totient is φ = 72502200.

The previous prime is 145004401. The next prime is 145004423. The reversal of 145004402 is 204400541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 109851361 + 35153041 = 10481^2 + 5929^2 .

It is not an unprimeable number, because it can be changed into a prime (145004401) 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, 36251099 + ... + 36251102.

Almost surely, 2^145004402 is an apocalyptic number.

145004402 is a deficient number, since it is larger than the sum of its proper divisors (72502204).

145004402 is an equidigital number, since it uses as much as digits as its factorization.

145004402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72502203.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 145004402 is about 12041.7773605062. Note that the first 3 decimals coincide. The cubic root of 145004402 is about 525.3641035849.

Adding to 145004402 its reverse (204400541), we get a palindrome (349404943).

The spelling of 145004402 in words is "one hundred forty-five million, four thousand, four hundred two".