12161700 has 54 divisors (see below), whose sum is σ = 38122994. Its totient is φ = 3242880.

The previous prime is 12161689. The next prime is 12161711. The reversal of 12161700 is 716121.

It is an interprime number because it is at equal distance from previous prime (12161689) and next prime (12161711).

It can be written as a sum of positive squares in 3 ways, for example, as 831744 + 11329956 = 912^2 + 3366^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent 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 17 ways as a sum of consecutive naturals, for example, 5857 + ... + 7656.

Almost surely, 2^12161700 is an apocalyptic number.

12161700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12161700 is an abundant number, since it is smaller than the sum of its proper divisors (25961294).

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

12161700 is a wasteful number, since it uses less digits than its factorization.

12161700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13533 (or 13523 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 12161700 is about 3487.3629005310. The cubic root of 12161700 is about 229.9665988043.

Adding to 12161700 its reverse (716121), we get a palindrome (12877821).

It can be divided in two parts, 1216 and 1700, that added together give a square (2916 = 54²).

The spelling of 12161700 in words is "twelve million, one hundred sixty-one thousand, seven hundred".