145440425 has 12 divisors (see below), whose sum is σ = 194219340. Its totient is φ = 107401920.

The previous prime is 145440413. The next prime is 145440439. The reversal of 145440425 is 524044541.

It can be written as a sum of positive squares in 6 ways, for example, as 5822569 + 139617856 = 2413^2 + 11816^2 .

It is not a de Polignac number, because 145440425 - 2¹⁰ = 145439401 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 223430 + ... + 224079.

It is an arithmetic number, because the mean of its divisors is an integer number (16184945).

Almost surely, 2^145440425 is an apocalyptic number.

It is an amenable number.

145440425 is a deficient number, since it is larger than the sum of its proper divisors (48778915).

145440425 is a wasteful number, since it uses less digits than its factorization.

145440425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447532 (or 447527 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 29.

The square root of 145440425 is about 12059.8683657824. The cubic root of 145440425 is about 525.8901602875.

Adding to 145440425 its reverse (524044541), we get a palindrome (669484966).

The spelling of 145440425 in words is "one hundred forty-five million, four hundred forty thousand, four hundred twenty-five".