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12870739 = 713713421
BaseRepresentation
bin110001000110…
…010001010011
3220012220100001
4301012101103
511243330424
61135510431
7214254010
oct61062123
926186301
1012870739
1172a0a82
124388417
13288842b
1419d0707
1511e3844
hexc46453

12870739 has 8 divisors (see below), whose sum is σ = 14817888. Its totient is φ = 10950720.

The previous prime is 12870721. The next prime is 12870749. The reversal of 12870739 is 93707821.

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 12870739 - 29 = 12870227 is a prime.

It is a super-2 number, since 2×128707392 = 331311844812242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12870698 and 12870707.

It is not an unprimeable number, because it can be changed into a prime (12870749) 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, 5752 + ... + 7669.

It is an arithmetic number, because the mean of its divisors is an integer number (1852236).

Almost surely, 212870739 is an apocalyptic number.

12870739 is the 1918-th nonagonal number.

12870739 is a deficient number, since it is larger than the sum of its proper divisors (1947149).

12870739 is a wasteful number, since it uses less digits than its factorization.

12870739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13565.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 12870739 is about 3587.5812185928. The cubic root of 12870739 is about 234.3515486817.

The spelling of 12870739 in words is "twelve million, eight hundred seventy thousand, seven hundred thirty-nine".

Divisors: 1 7 137 959 13421 93947 1838677 12870739