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1221010 = 25717443
BaseRepresentation
bin100101010000110010010
32022000220121
410222012102
5303033020
642100454
713243540
oct4520622
92260817
101221010
117643aa
124aa72a
133399bb
1423ad90
15191baa
hex12a192

1221010 has 16 divisors (see below), whose sum is σ = 2511936. Its totient is φ = 418608.

The previous prime is 1220993. The next prime is 1221019. The reversal of 1221010 is 101221.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a plaindrome in base 13.

It is a zygodrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 1220984 and 1221002.

It is not an unprimeable number, because it can be changed into a prime (1221019) 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, 8652 + ... + 8791.

It is an arithmetic number, because the mean of its divisors is an integer number (156996).

21221010 is an apocalyptic number.

1221010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221010 is an abundant number, since it is smaller than the sum of its proper divisors (1290926).

1221010 is a wasteful number, since it uses less digits than its factorization.

1221010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17457.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 1221010 is about 1104.9932126488. The cubic root of 1221010 is about 106.8824516310.

Adding to 1221010 its reverse (101221), we get a palindrome (1322231).

The spelling of 1221010 in words is "one million, two hundred twenty-one thousand, ten".

Divisors: 1 2 5 7 10 14 35 70 17443 34886 87215 122101 174430 244202 610505 1221010