12315022 has 4 divisors (see below), whose sum is σ = 18472536. Its totient is φ = 6157510.

The previous prime is 12315013. The next prime is 12315077. The reversal of 12315022 is 22051321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22051321 = 1699 ⋅12979.

It is a junction number, because it is equal to n+sod(n) for n = 12314987 and 12315005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3078754 + ... + 3078757.

It is an arithmetic number, because the mean of its divisors is an integer number (4618134).

Almost surely, 2^12315022 is an apocalyptic number.

12315022 is a deficient number, since it is larger than the sum of its proper divisors (6157514).

12315022 is an equidigital number, since it uses as much as digits as its factorization.

12315022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6157513.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 12315022 is about 3509.2765636239. The cubic root of 12315022 is about 230.9289587457.

Adding to 12315022 its reverse (22051321), we get a palindrome (34366343).

The spelling of 12315022 in words is "twelve million, three hundred fifteen thousand, twenty-two".