11998725 has 24 divisors (see below), whose sum is σ = 19983840. Its totient is φ = 6352320.

The previous prime is 11998717. The next prime is 11998733. The reversal of 11998725 is 52789911.

It is an interprime number because it is at equal distance from previous prime (11998717) and next prime (11998733).

It is not a de Polignac number, because 11998725 - 2³ = 11998717 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11266 + ... + 12284.

It is an arithmetic number, because the mean of its divisors is an integer number (832660).

Almost surely, 2^11998725 is an apocalyptic number.

11998725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11998725 is a deficient number, since it is larger than the sum of its proper divisors (7985115).

11998725 is a wasteful number, since it uses less digits than its factorization.

11998725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189 (or 1184 counting only the distinct ones).

The product of its digits is 45360, while the sum is 42.

The square root of 11998725 is about 3463.9175798509. The cubic root of 11998725 is about 228.9347398309.

The spelling of 11998725 in words is "eleven million, nine hundred ninety-eight thousand, seven hundred twenty-five".