12271642 has 8 divisors (see below), whose sum is σ = 18905076. Its totient is φ = 5969952.

The previous prime is 12271639. The next prime is 12271643. The reversal of 12271642 is 24617221.

It can be written as a sum of positive squares in 2 ways, for example, as 12257001 + 14641 = 3501^2 + 121^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12271643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82843 + ... + 82990.

Almost surely, 2^12271642 is an apocalyptic number.

12271642 is a deficient number, since it is larger than the sum of its proper divisors (6633434).

12271642 is a wasteful number, since it uses less digits than its factorization.

12271642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165872.

The product of its digits is 1344, while the sum is 25.

The square root of 12271642 is about 3503.0903499624. The cubic root of 12271642 is about 230.6574885623.

Adding to 12271642 its reverse (24617221), we get a palindrome (36888863).

The spelling of 12271642 in words is "twelve million, two hundred seventy-one thousand, six hundred forty-two".