12161070 has 64 divisors (see below), whose sum is σ = 32927040. Its totient is φ = 3193344.

The previous prime is 12161053. The next prime is 12161099. The reversal of 12161070 is 7016121.

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

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

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 31 ways as a sum of consecutive naturals, for example, 19402 + ... + 20018.

It is an arithmetic number, because the mean of its divisors is an integer number (514485).

Almost surely, 2^12161070 is an apocalyptic number.

12161070 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 12161070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16463520).

12161070 is an abundant number, since it is smaller than the sum of its proper divisors (20765970).

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

12161070 is a wasteful number, since it uses less digits than its factorization.

12161070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706 (or 700 counting only the distinct ones).

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

The square root of 12161070 is about 3487.2725732297. The cubic root of 12161070 is about 229.9626278283.

Adding to 12161070 its reverse (7016121), we get a palindrome (19177191).

The spelling of 12161070 in words is "twelve million, one hundred sixty-one thousand, seventy".