12172142 has 8 divisors (see below), whose sum is σ = 18446736. Its totient is φ = 6023232.

The previous prime is 12172133. The next prime is 12172151. The reversal of 12172142 is 24127121.

It is an interprime number because it is at equal distance from previous prime (12172133) and next prime (12172151).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12172142² = 296322081736328, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31178 + ... + 31565.

It is an arithmetic number, because the mean of its divisors is an integer number (2305842).

Almost surely, 2^12172142 is an apocalyptic number.

12172142 is a deficient number, since it is larger than the sum of its proper divisors (6274594).

12172142 is an equidigital number, since it uses as much as digits as its factorization.

12172142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62842.

The product of its digits is 224, while the sum is 20.

The square root of 12172142 is about 3488.8596990994. The cubic root of 12172142 is about 230.0323961928.

Adding to 12172142 its reverse (24127121), we get a palindrome (36299263).

The spelling of 12172142 in words is "twelve million, one hundred seventy-two thousand, one hundred forty-two".