245021005 has 8 divisors (see below), whose sum is σ = 297329400. Its totient is φ = 193814016.

The previous prime is 245021003. The next prime is 245021033. The reversal of 245021005 is 500120542.

It can be written as a sum of positive squares in 4 ways, for example, as 4553956 + 240467049 = 2134^2 + 15507^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 245021005 - 2¹ = 245021003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245021003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274860 + ... + 275749.

It is an arithmetic number, because the mean of its divisors is an integer number (37166175).

Almost surely, 2^245021005 is an apocalyptic number.

It is an amenable number.

245021005 is a deficient number, since it is larger than the sum of its proper divisors (52308395).

245021005 is an equidigital number, since it uses as much as digits as its factorization.

245021005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550703.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 245021005 is about 15653.1468082300. The cubic root of 245021005 is about 625.7503563840.

Adding to 245021005 its reverse (500120542), we get a palindrome (745141547).

The spelling of 245021005 in words is "two hundred forty-five million, twenty-one thousand, five".