247142825 has 12 divisors (see below), whose sum is σ = 306652620. Its totient is φ = 197588160.

The previous prime is 247142813. The next prime is 247142839. The reversal of 247142825 is 528241742.

It can be written as a sum of positive squares in 6 ways, for example, as 65108761 + 182034064 = 8069^2 + 13492^2 .

It is not a de Polignac number, because 247142825 - 2⁴ = 247142809 is a prime.

It is a super-2 number, since 2×247142825² = 122159151897961250, which contains 22 as substring.

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, 71231 + ... + 74619.

It is an arithmetic number, because the mean of its divisors is an integer number (25554385).

Almost surely, 2^247142825 is an apocalyptic number.

247142825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

247142825 is a deficient number, since it is larger than the sum of its proper divisors (59509795).

247142825 is a wasteful number, since it uses less digits than its factorization.

247142825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6316 (or 6311 counting only the distinct ones).

The product of its digits is 35840, while the sum is 35.

The square root of 247142825 is about 15720.7768573948. The cubic root of 247142825 is about 627.5514473461.

The spelling of 247142825 in words is "two hundred forty-seven million, one hundred forty-two thousand, eight hundred twenty-five".