247640425 has 24 divisors (see below), whose sum is σ = 331496640. Its totient is φ = 182952000.

The previous prime is 247640417. The next prime is 247640467. The reversal of 247640425 is 524046742.

247640425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 247640425 - 2³ = 247640417 is a prime.

It is a super-2 number, since 2×247640425² = 122651560188361250, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9250 + ... + 24100.

It is an arithmetic number, because the mean of its divisors is an integer number (13812360).

Almost surely, 2^247640425 is an apocalyptic number.

247640425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

247640425 is a deficient number, since it is larger than the sum of its proper divisors (83856215).

247640425 is a wasteful number, since it uses less digits than its factorization.

247640425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14913 (or 14908 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 34.

The square root of 247640425 is about 15736.5950891545. The cubic root of 247640425 is about 627.9723379231.

The spelling of 247640425 in words is "two hundred forty-seven million, six hundred forty thousand, four hundred twenty-five".