247475725 has 18 divisors (see below), whose sum is σ = 356972874. Its totient is φ = 169696800.

The previous prime is 247475717. The next prime is 247475729. The reversal of 247475725 is 527574742.

It can be written as a sum of positive squares in 3 ways, for example, as 14394436 + 233081289 = 3794^2 + 15267^2 .

It is not a de Polignac number, because 247475725 - 2³ = 247475717 is a prime.

It is a super-2 number, since 2×247475725² = 122488468928551250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247475729) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 99786 + ... + 102235.

Almost surely, 2^247475725 is an apocalyptic number.

247475725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

247475725 is a deficient number, since it is larger than the sum of its proper divisors (109497149).

247475725 is a wasteful number, since it uses less digits than its factorization.

247475725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202045 (or 202033 counting only the distinct ones).

The product of its digits is 548800, while the sum is 43.

The square root of 247475725 is about 15731.3611934886. The cubic root of 247475725 is about 627.8330903541.

The spelling of 247475725 in words is "two hundred forty-seven million, four hundred seventy-five thousand, seven hundred twenty-five".