12220537 has 8 divisors (see below), whose sum is σ = 14069376. Its totient is φ = 10397472.

The previous prime is 12220531. The next prime is 12220543. The reversal of 12220537 is 73502221.

It is an interprime number because it is at equal distance from previous prime (12220531) and next prime (12220543).

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

It is a cyclic number.

It is not a de Polignac number, because 12220537 - 2³ = 12220529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12220531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5413 + ... + 7330.

It is an arithmetic number, because the mean of its divisors is an integer number (1758672).

Almost surely, 2^12220537 is an apocalyptic number.

It is an amenable number.

12220537 is a deficient number, since it is larger than the sum of its proper divisors (1848839).

12220537 is a wasteful number, since it uses less digits than its factorization.

12220537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12887.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 12220537 is about 3495.7884661404. The cubic root of 12220537 is about 230.3368536058.

Adding to 12220537 its reverse (73502221), we get a palindrome (85722758).

The spelling of 12220537 in words is "twelve million, two hundred twenty thousand, five hundred thirty-seven".