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1113891 = 31721841
BaseRepresentation
bin100001111111100100011
32002120222020
410033330203
5241121031
635512523
712316332
oct4177443
92076866
101113891
116a0979
12458743
1330000c
1420dd19
15170096
hex10ff23

1113891 has 8 divisors (see below), whose sum is σ = 1572624. Its totient is φ = 698880.

The previous prime is 1113887. The next prime is 1113899. The reversal of 1113891 is 1983111.

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

It is not a de Polignac number, because 1113891 - 22 = 1113887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1113899) 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, 10870 + ... + 10971.

It is an arithmetic number, because the mean of its divisors is an integer number (196578).

21113891 is an apocalyptic number.

1113891 is the 668-th centered pentagonal number.

1113891 is a deficient number, since it is larger than the sum of its proper divisors (458733).

1113891 is a wasteful number, since it uses less digits than its factorization.

1113891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21861.

The product of its digits is 216, while the sum is 24.

The square root of 1113891 is about 1055.4103467372. The cubic root of 1113891 is about 103.6607225402.

The spelling of 1113891 in words is "one million, one hundred thirteen thousand, eight hundred ninety-one".

Divisors: 1 3 17 51 21841 65523 371297 1113891