250420145 has 4 divisors (see below), whose sum is σ = 300504180. Its totient is φ = 200336112.

The previous prime is 250420141. The next prime is 250420151. The reversal of 250420145 is 541024052.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 200052736 + 50367409 = 14144^2 + 7097^2 .

It is a cyclic number.

It is not a de Polignac number, because 250420145 - 2² = 250420141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 250420145.

It is not an unprimeable number, because it can be changed into a prime (250420141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25042010 + ... + 25042019.

It is an arithmetic number, because the mean of its divisors is an integer number (75126045).

Almost surely, 2^250420145 is an apocalyptic number.

It is an amenable number.

250420145 is a deficient number, since it is larger than the sum of its proper divisors (50084035).

250420145 is an equidigital number, since it uses as much as digits as its factorization.

250420145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50084034.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 250420145 is about 15824.6688748928. The cubic root of 250420145 is about 630.3132271261.

Adding to 250420145 its reverse (541024052), we get a palindrome (791444197).

The spelling of 250420145 in words is "two hundred fifty million, four hundred twenty thousand, one hundred forty-five".