12142251 has 16 divisors (see below), whose sum is σ = 19624320. Its totient is φ = 7358760.

The previous prime is 12142237. The next prime is 12142261. The reversal of 12142251 is 15224121.

It is not a de Polignac number, because 12142251 - 2⁵ = 12142219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12142231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20145 + ... + 20738.

It is an arithmetic number, because the mean of its divisors is an integer number (1226520).

Almost surely, 2^12142251 is an apocalyptic number.

12142251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12142251 is a deficient number, since it is larger than the sum of its proper divisors (7482069).

12142251 is a wasteful number, since it uses less digits than its factorization.

12142251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40903 (or 40897 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 12142251 is about 3484.5732880799. The cubic root of 12142251 is about 229.8439458115.

Adding to 12142251 its reverse (15224121), we get a palindrome (27366372).

The spelling of 12142251 in words is "twelve million, one hundred forty-two thousand, two hundred fifty-one".