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12231421 = 194713697
BaseRepresentation
bin101110101010…
…001011111101
3212000102100121
4232222023331
511112401141
61114054541
7205652056
oct56521375
925012317
1012231421
1169a4714
12411a451
1326c3437
1418a572d
1511191d1
hexbaa2fd

12231421 has 8 divisors (see below), whose sum is σ = 13150080. Its totient is φ = 11340288.

The previous prime is 12231419. The next prime is 12231431. The reversal of 12231421 is 12413221.

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 12231421 - 21 = 12231419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12231395 and 12231404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12231431) 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, 5956 + ... + 7741.

It is an arithmetic number, because the mean of its divisors is an integer number (1643760).

Almost surely, 212231421 is an apocalyptic number.

It is an amenable number.

12231421 is a deficient number, since it is larger than the sum of its proper divisors (918659).

12231421 is a wasteful number, since it uses less digits than its factorization.

12231421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13763.

The product of its digits is 96, while the sum is 16.

The square root of 12231421 is about 3497.3448500255. The cubic root of 12231421 is about 230.4052150974.

Adding to 12231421 its reverse (12413221), we get a palindrome (24644642).

The spelling of 12231421 in words is "twelve million, two hundred thirty-one thousand, four hundred twenty-one".

Divisors: 1 19 47 893 13697 260243 643759 12231421