12315100 has 72 divisors (see below), whose sum is σ = 31088288. Its totient is φ = 4147200.

The previous prime is 12315077. The next prime is 12315101. The reversal of 12315100 is 151321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12315101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50980 + ... + 51220.

Almost surely, 2^12315100 is an apocalyptic number.

12315100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12315100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15544144).

12315100 is an abundant number, since it is smaller than the sum of its proper divisors (18773188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12315100 is a wasteful number, since it uses less digits than its factorization.

12315100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 12315100 is about 3509.2876770080. The cubic root of 12315100 is about 230.9294462917.

Adding to 12315100 its reverse (151321), we get a palindrome (12466421).

The spelling of 12315100 in words is "twelve million, three hundred fifteen thousand, one hundred".