245647001 has 4 divisors (see below), whose sum is σ = 246101604. Its totient is φ = 245192400.

The previous prime is 245646979. The next prime is 245647009. The reversal of 245647001 is 100746542.

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 38142976 + 207504025 = 6176^2 + 14405^2 .

It is a cyclic number.

It is not a de Polignac number, because 245647001 - 2⁶ = 245646937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245647009) 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 in 3 ways as a sum of consecutive naturals, for example, 226490 + ... + 227571.

It is an arithmetic number, because the mean of its divisors is an integer number (61525401).

Almost surely, 2^245647001 is an apocalyptic number.

It is an amenable number.

245647001 is a deficient number, since it is larger than the sum of its proper divisors (454603).

245647001 is an equidigital number, since it uses as much as digits as its factorization.

245647001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454602.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 245647001 is about 15673.1299043937. The cubic root of 245647001 is about 626.2828061056.

The spelling of 245647001 in words is "two hundred forty-five million, six hundred forty-seven thousand, one".