12212258 has 16 divisors (see below), whose sum is σ = 18861216. Its totient is φ = 5927040.

The previous prime is 12212237. The next prime is 12212279. The reversal of 12212258 is 85221221.

It is an interprime number because it is at equal distance from previous prime (12212237) and next prime (12212279).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17810 + ... + 18482.

It is an arithmetic number, because the mean of its divisors is an integer number (1178826).

Almost surely, 2^12212258 is an apocalyptic number.

12212258 is a deficient number, since it is larger than the sum of its proper divisors (6648958).

12212258 is a wasteful number, since it uses less digits than its factorization.

12212258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929.

The product of its digits is 640, while the sum is 23.

The square root of 12212258 is about 3494.6041263640. The cubic root of 12212258 is about 230.2848267157.

Adding to 12212258 its reverse (85221221), we get a palindrome (97433479).

The spelling of 12212258 in words is "twelve million, two hundred twelve thousand, two hundred fifty-eight".