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1030221 = 321131013
BaseRepresentation
bin11111011100001001101
31221100012100
43323201031
5230431341
634025313
711520363
oct3734115
91840170
101030221
11644025
12418239
132a0bca
141cb633
151553b6
hexfb84d

1030221 has 12 divisors (see below), whose sum is σ = 1502748. Its totient is φ = 680064.

The previous prime is 1030219. The next prime is 1030241. The reversal of 1030221 is 1220301.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8100 + 1022121 = 90^2 + 1011^2 .

It is not a de Polignac number, because 1030221 - 21 = 1030219 is a prime.

It is a super-2 number, since 2×10302212 = 2122710617682, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

1030221 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1030201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 511 + ... + 1523.

It is an arithmetic number, because the mean of its divisors is an integer number (125229).

21030221 is an apocalyptic number.

It is an amenable number.

1030221 is a deficient number, since it is larger than the sum of its proper divisors (472527).

1030221 is a wasteful number, since it uses less digits than its factorization.

1030221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132 (or 1129 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1030221 is about 1014.9980295547. The cubic root of 1030221 is about 100.9973858095.

Adding to 1030221 its reverse (1220301), we get a palindrome (2250522).

The spelling of 1030221 in words is "one million, thirty thousand, two hundred twenty-one".

Divisors: 1 3 9 113 339 1013 1017 3039 9117 114469 343407 1030221