12171950 has 48 divisors (see below), whose sum is σ = 26248320. Its totient is φ = 4113120.

The previous prime is 12171937. The next prime is 12171953. The reversal of 12171950 is 5917121.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12171953) 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, 28841 + ... + 29259.

It is an arithmetic number, because the mean of its divisors is an integer number (546840).

Almost surely, 2^12171950 is an apocalyptic number.

12171950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12171950 is an abundant number, since it is smaller than the sum of its proper divisors (14076370).

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

12171950 is a wasteful number, since it uses less digits than its factorization.

12171950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521 (or 516 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 26.

The square root of 12171950 is about 3488.8321828371. The cubic root of 12171950 is about 230.0311866973.

The spelling of 12171950 in words is "twelve million, one hundred seventy-one thousand, nine hundred fifty".