247284725 has 12 divisors (see below), whose sum is σ = 306830436. Its totient is φ = 197700480.

The previous prime is 247284689. The next prime is 247284731. The reversal of 247284725 is 527482742.

247284725 = 9078² + 9079² + 9080².

It can be written as a sum of positive squares in 6 ways, for example, as 46977316 + 200307409 = 6854^2 + 14153^2 .

It is not a de Polignac number, because 247284725 - 2⁸ = 247284469 is a prime.

It is a super-2 number, since 2×247284725² = 122299470436651250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65489 + ... + 69161.

It is an arithmetic number, because the mean of its divisors is an integer number (25569203).

Almost surely, 2^247284725 is an apocalyptic number.

247284725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

247284725 is a deficient number, since it is larger than the sum of its proper divisors (59545711).

247284725 is a wasteful number, since it uses less digits than its factorization.

247284725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6376 (or 6371 counting only the distinct ones).

The product of its digits is 250880, while the sum is 41.

The square root of 247284725 is about 15725.2893455097. The cubic root of 247284725 is about 627.6715297490.

The spelling of 247284725 in words is "two hundred forty-seven million, two hundred eighty-four thousand, seven hundred twenty-five".