247428925 has 24 divisors (see below), whose sum is σ = 324934560. Its totient is φ = 186379200.

The previous prime is 247428889. The next prime is 247428941. The reversal of 247428925 is 529824742.

It is a happy number.

It is not a de Polignac number, because 247428925 - 2⁹ = 247428413 is a prime.

It is a super-2 number, since 2×247428925² = 122442145853311250, which contains 22 as substring.

It is a congruent number.

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, 80670 + ... + 83680.

It is an arithmetic number, because the mean of its divisors is an integer number (13538940).

Almost surely, 2^247428925 is an apocalyptic number.

247428925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

247428925 is a deficient number, since it is larger than the sum of its proper divisors (77505635).

247428925 is a wasteful number, since it uses less digits than its factorization.

247428925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3213 (or 3208 counting only the distinct ones).

The product of its digits is 322560, while the sum is 43.

The square root of 247428925 is about 15729.8736485707. The cubic root of 247428925 is about 627.7935114674.

The spelling of 247428925 in words is "two hundred forty-seven million, four hundred twenty-eight thousand, nine hundred twenty-five".