Search a number
-
+
10247881 = 71463983
BaseRepresentation
bin100111000101…
…111011001001
3201021122110011
4213011323021
510110413011
61003351521
7153051130
oct47057311
921248404
1010247881
11586a426
1235225a1
13217a647
14150a917
15d76621
hex9c5ec9

10247881 has 4 divisors (see below), whose sum is σ = 11711872. Its totient is φ = 8783892.

The previous prime is 10247879. The next prime is 10247891. The reversal of 10247881 is 18874201.

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 10247881 - 21 = 10247879 is a prime.

It is a super-2 number, since 2×102478812 = 210038129980322, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (10247891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 731985 + ... + 731998.

It is an arithmetic number, because the mean of its divisors is an integer number (2927968).

Almost surely, 210247881 is an apocalyptic number.

It is an amenable number.

10247881 is a deficient number, since it is larger than the sum of its proper divisors (1463991).

10247881 is an equidigital number, since it uses as much as digits as its factorization.

10247881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1463990.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 10247881 is about 3201.2311694097. The cubic root of 10247881 is about 217.2091042222.

The spelling of 10247881 in words is "ten million, two hundred forty-seven thousand, eight hundred eighty-one".

Divisors: 1 7 1463983 10247881