247925245 has 4 divisors (see below), whose sum is σ = 297510300. Its totient is φ = 198340192.

The previous prime is 247925221. The next prime is 247925261. The reversal of 247925245 is 542529742.

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 114961284 + 132963961 = 10722^2 + 11531^2 .

It is a cyclic number.

It is not a de Polignac number, because 247925245 - 2⁵ = 247925213 is a prime.

It is a super-2 number, since 2×247925245² = 122933854216620050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247925198 and 247925207.

It is a congruent number.

It is an unprimeable number.

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, 24792520 + ... + 24792529.

It is an arithmetic number, because the mean of its divisors is an integer number (74377575).

Almost surely, 2^247925245 is an apocalyptic number.

It is an amenable number.

247925245 is a deficient number, since it is larger than the sum of its proper divisors (49585055).

247925245 is an equidigital number, since it uses as much as digits as its factorization.

247925245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49585054.

The product of its digits is 201600, while the sum is 40.

The square root of 247925245 is about 15745.6420955133. The cubic root of 247925245 is about 628.2129967390.

The spelling of 247925245 in words is "two hundred forty-seven million, nine hundred twenty-five thousand, two hundred forty-five".