12137850 has 108 divisors (see below), whose sum is σ = 34778094. Its totient is φ = 3149280.

The previous prime is 12137849. The next prime is 12137857. The reversal of 12137850 is 5873121.

It can be written as a sum of positive squares in 3 ways, for example, as 11029041 + 1108809 = 3321^2 + 1053^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12137857) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 328032 + ... + 328068.

Almost surely, 2^12137850 is an apocalyptic number.

12137850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12137850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17389047).

12137850 is an abundant number, since it is smaller than the sum of its proper divisors (22640244).

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

12137850 is an frugal number, since it uses more digits than its factorization.

12137850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 12137850 is about 3483.9417331523. The cubic root of 12137850 is about 229.8161732170.

The spelling of 12137850 in words is "twelve million, one hundred thirty-seven thousand, eight hundred fifty".