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13132421 = 16380567
BaseRepresentation
bin110010000110…
…001010000101
3220201012021222
4302012022011
511330214141
61145250125
7216423641
oct62061205
926635258
1013132421
11745a645
124493945
13294a583
141a5bc21
15124614b
hexc86285

13132421 has 4 divisors (see below), whose sum is σ = 13213152. Its totient is φ = 13051692.

The previous prime is 13132417. The next prime is 13132487. The reversal of 13132421 is 12423131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13132421 - 22 = 13132417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13132421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13132321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40121 + ... + 40446.

It is an arithmetic number, because the mean of its divisors is an integer number (3303288).

Almost surely, 213132421 is an apocalyptic number.

It is an amenable number.

13132421 is a deficient number, since it is larger than the sum of its proper divisors (80731).

13132421 is an equidigital number, since it uses as much as digits as its factorization.

13132421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80730.

The product of its digits is 144, while the sum is 17.

The square root of 13132421 is about 3623.8682371190. The cubic root of 13132421 is about 235.9291477914.

Adding to 13132421 its reverse (12423131), we get a palindrome (25555552).

The spelling of 13132421 in words is "thirteen million, one hundred thirty-two thousand, four hundred twenty-one".

Divisors: 1 163 80567 13132421