247572001 has 4 divisors (see below), whose sum is σ = 248058900. Its totient is φ = 247085104.

The previous prime is 247571971. The next prime is 247572007. The reversal of 247572001 is 100275742.

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 225000000 + 22572001 = 15000^2 + 4751^2 .

It is a cyclic number.

It is not a de Polignac number, because 247572001 - 2⁷ = 247571873 is a prime.

It is a super-2 number, since 2×247572001² = 122583791358288002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (247572007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242686 + ... + 243703.

It is an arithmetic number, because the mean of its divisors is an integer number (62014725).

Almost surely, 2^247572001 is an apocalyptic number.

It is an amenable number.

247572001 is a deficient number, since it is larger than the sum of its proper divisors (486899).

247572001 is an equidigital number, since it uses as much as digits as its factorization.

247572001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486898.

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 247572001 is about 15734.4208981456. The cubic root of 247572001 is about 627.9144955396.

The spelling of 247572001 in words is "two hundred forty-seven million, five hundred seventy-two thousand, one".