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BaseRepresentation
bin11110100011000111110
31212212010220
43310120332
5224013042
633242210
711336301
oct3643076
91785126
101001022
116240a0
12403366
13290829
141c0b38
1514b8ec
hexf463e

1001022 has 32 divisors (see below), whose sum is σ = 2263680. Its totient is φ = 292320.

The previous prime is 1001017. The next prime is 1001023. The reversal of 1001022 is 2201001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a self number, because there is not a number n which added to its sum of digits gives 1001022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1653 + ... + 2175.

It is an arithmetic number, because the mean of its divisors is an integer number (70740).

21001022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1001022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1131840).

1001022 is an abundant number, since it is smaller than the sum of its proper divisors (1262658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1001022 is a wasteful number, since it uses less digits than its factorization.

1001022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568.

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 1001022 is about 1000.5108695062. The cubic root of 1001022 is about 100.0340550679.

Adding to 1001022 its reverse (2201001), we get a palindrome (3202023).

The spelling of 1001022 in words is "one million, one thousand, twenty-two".