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13195745 = 52639149
BaseRepresentation
bin110010010101…
…100111100001
3220211102011022
4302111213201
511334230440
61150455225
7220106363
oct62254741
926742138
1013195745
1174a3182
124504515
132970344
141a76d33
151259cb5
hexc959e1

13195745 has 4 divisors (see below), whose sum is σ = 15834900. Its totient is φ = 10556592.

The previous prime is 13195733. The next prime is 13195753. The reversal of 13195745 is 54759131.

13195745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54759131 = 77822733.

It can be written as a sum of positive squares in 2 ways, for example, as 1852321 + 11343424 = 1361^2 + 3368^2 .

It is a cyclic number.

It is not a de Polignac number, because 13195745 - 212 = 13191649 is a prime.

It is a super-2 number, since 2×131957452 = 348255372210050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1319570 + ... + 1319579.

It is an arithmetic number, because the mean of its divisors is an integer number (3958725).

Almost surely, 213195745 is an apocalyptic number.

It is an amenable number.

13195745 is a deficient number, since it is larger than the sum of its proper divisors (2639155).

13195745 is an equidigital number, since it uses as much as digits as its factorization.

13195745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2639154.

The product of its digits is 18900, while the sum is 35.

The square root of 13195745 is about 3632.5948026170. The cubic root of 13195745 is about 236.3077534868.

The spelling of 13195745 in words is "thirteen million, one hundred ninety-five thousand, seven hundred forty-five".

Divisors: 1 5 2639149 13195745