Search a number
-
+
1861011121 = 23180144927
BaseRepresentation
bin110111011101100…
…1100011010110001
311210200211011022211
41232323030122301
512302404323441
6504355532121
764055222254
oct15673143261
94720734284
101861011121
11875546222
1243b2ba041
13238732318
1413923909b
15ad5aaa81
hex6eecc6b1

1861011121 has 8 divisors (see below), whose sum is σ = 1943046144. Its totient is φ = 1779069600.

The previous prime is 1861011083. The next prime is 1861011169. The reversal of 1861011121 is 1211101681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-1861011121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1861011092 and 1861011101.

It is not an unprimeable number, because it can be changed into a prime (1861011181) 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, 18960 + ... + 63886.

It is an arithmetic number, because the mean of its divisors is an integer number (242880768).

Almost surely, 21861011121 is an apocalyptic number.

It is an amenable number.

1861011121 is a deficient number, since it is larger than the sum of its proper divisors (82035023).

1861011121 is a wasteful number, since it uses less digits than its factorization.

1861011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46751.

The product of its (nonzero) digits is 96, while the sum is 22.

The square root of 1861011121 is about 43139.4381164150. The cubic root of 1861011121 is about 1230.0317529864.

The spelling of 1861011121 in words is "one billion, eight hundred sixty-one million, eleven thousand, one hundred twenty-one".

Divisors: 1 23 1801 41423 44927 1033321 80913527 1861011121