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13247157 = 371157347
BaseRepresentation
bin110010100010…
…001010110101
3220221000200110
4302202022311
511342402112
61151533233
7220412310
oct62421265
926830613
1013247157
117528870
12452a219
13298a871
141a8b977
15126a13c
hexca22b5

13247157 has 16 divisors (see below), whose sum is σ = 22021632. Its totient is φ = 6881520.

The previous prime is 13247119. The next prime is 13247159. The reversal of 13247157 is 75174231.

It is not a de Polignac number, because 13247157 - 210 = 13246133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13247159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28443 + ... + 28904.

It is an arithmetic number, because the mean of its divisors is an integer number (1376352).

Almost surely, 213247157 is an apocalyptic number.

It is an amenable number.

13247157 is a deficient number, since it is larger than the sum of its proper divisors (8774475).

13247157 is a wasteful number, since it uses less digits than its factorization.

13247157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57368.

The product of its digits is 5880, while the sum is 30.

The square root of 13247157 is about 3639.6644076068. The cubic root of 13247157 is about 236.6142490097.

The spelling of 13247157 in words is "thirteen million, two hundred forty-seven thousand, one hundred fifty-seven".

Divisors: 1 3 7 11 21 33 77 231 57347 172041 401429 630817 1204287 1892451 4415719 13247157