12215895 has 8 divisors (see below), whose sum is σ = 19545456. Its totient is φ = 6515136.

The previous prime is 12215851. The next prime is 12215897. The reversal of 12215895 is 59851221.

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

It is not a de Polignac number, because 12215895 - 2⁶ = 12215831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12215897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 407182 + ... + 407211.

It is an arithmetic number, because the mean of its divisors is an integer number (2443182).

Almost surely, 2^12215895 is an apocalyptic number.

12215895 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12215895 is a deficient number, since it is larger than the sum of its proper divisors (7329561).

12215895 is an equidigital number, since it uses as much as digits as its factorization.

12215895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814401.

The product of its digits is 7200, while the sum is 33.

The square root of 12215895 is about 3495.1244613032. The cubic root of 12215895 is about 230.3076852453.

The spelling of 12215895 in words is "twelve million, two hundred fifteen thousand, eight hundred ninety-five".