12690234 has 12 divisors (see below), whose sum is σ = 27495546. Its totient is φ = 4230072.

The previous prime is 12690199. The next prime is 12690259. The reversal of 12690234 is 43209621.

It can be written as a sum of positive squares in only one way, i.e., 11594025 + 1096209 = 3405^2 + 1047^2 .

It is a super-2 number, since 2×12690234² = 322084077949512, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12690198 and 12690207.

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 5 ways as a sum of consecutive naturals, for example, 352489 + ... + 352524.

Almost surely, 2^12690234 is an apocalyptic number.

12690234 is an abundant number, since it is smaller than the sum of its proper divisors (14805312).

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

12690234 is a wasteful number, since it uses less digits than its factorization.

12690234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705021 (or 705018 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 12690234 is about 3562.3354698849. The cubic root of 12690234 is about 233.2508365957.

Adding to 12690234 its reverse (43209621), we get a palindrome (55899855).

The spelling of 12690234 in words is "twelve million, six hundred ninety thousand, two hundred thirty-four".