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1801033 = 13210657
BaseRepresentation
bin110110111101101001001
310101111112221
412313231021
5430113113
6102334041
721210553
oct6675511
93344487
101801033
111020163
1272a321
134b0a00
1434c4d3
1525898d
hex1b7b49

1801033 has 6 divisors (see below), whose sum is σ = 1950414. Its totient is φ = 1662336.

The previous prime is 1801021. The next prime is 1801039. The reversal of 1801033 is 3301081.

It can be written as a sum of positive squares in 3 ways, for example, as 131769 + 1669264 = 363^2 + 1292^2 .

It is a de Polignac number, because none of the positive numbers 2k-1801033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1800998 and 1801016.

It is not an unprimeable number, because it can be changed into a prime (1801039) 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 5 ways as a sum of consecutive naturals, for example, 5160 + ... + 5497.

It is an arithmetic number, because the mean of its divisors is an integer number (325069).

21801033 is an apocalyptic number.

1801033 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1801033 is a deficient number, since it is larger than the sum of its proper divisors (149381).

1801033 is a wasteful number, since it uses less digits than its factorization.

1801033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10683 (or 10670 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1801033 is about 1342.0257076524. The cubic root of 1801033 is about 121.6673055157.

The spelling of 1801033 in words is "one million, eight hundred one thousand, thirty-three".

Divisors: 1 13 169 10657 138541 1801033