12961850 has 24 divisors (see below), whose sum is σ = 26301888. Its totient is φ = 4713200.

The previous prime is 12961849. The next prime is 12961867. The reversal of 12961850 is 5816921.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11234 + ... + 12333.

It is an arithmetic number, because the mean of its divisors is an integer number (1095912).

Almost surely, 2^12961850 is an apocalyptic number.

12961850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12961850 is an abundant number, since it is smaller than the sum of its proper divisors (13340038).

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

12961850 is a wasteful number, since it uses less digits than its factorization.

12961850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23590 (or 23585 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 12961850 is about 3600.2569352756. The cubic root of 12961850 is about 234.9032346438.

Subtracting from 12961850 its reverse (5816921), we obtain a square (7144929 = 2673²).

The spelling of 12961850 in words is "twelve million, nine hundred sixty-one thousand, eight hundred fifty".