11725815 has 8 divisors (see below), whose sum is σ = 18761328. Its totient is φ = 6253760.

The previous prime is 11725811. The next prime is 11725823. The reversal of 11725815 is 51852711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11725815 - 2² = 11725811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11725811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390846 + ... + 390875.

It is an arithmetic number, because the mean of its divisors is an integer number (2345166).

Almost surely, 2^11725815 is an apocalyptic number.

11725815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11725815 is a deficient number, since it is larger than the sum of its proper divisors (7035513).

11725815 is an equidigital number, since it uses as much as digits as its factorization.

11725815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781729.

The product of its digits is 2800, while the sum is 30.

The square root of 11725815 is about 3424.2977382231. The cubic root of 11725815 is about 227.1857110033.

The spelling of 11725815 in words is "eleven million, seven hundred twenty-five thousand, eight hundred fifteen".