18125247 has 24 divisors (see below), whose sum is σ = 29770416. Its totient is φ = 9746688.

The previous prime is 18125201. The next prime is 18125251. The reversal of 18125247 is 74252181.

It is not a de Polignac number, because 18125247 - 2¹² = 18121151 is a prime.

It is a super-3 number, since 3×18125247³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18125267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1128 + ... + 6125.

It is an arithmetic number, because the mean of its divisors is an integer number (1240434).

Almost surely, 2^18125247 is an apocalyptic number.

18125247 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

18125247 is a deficient number, since it is larger than the sum of its proper divisors (11645169).

18125247 is a wasteful number, since it uses less digits than its factorization.

18125247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7287 (or 7280 counting only the distinct ones).

The product of its digits is 4480, while the sum is 30.

The square root of 18125247 is about 4257.3756000616. The cubic root of 18125247 is about 262.6805868479.

The spelling of 18125247 in words is "eighteen million, one hundred twenty-five thousand, two hundred forty-seven".