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2001021 = 31160637
BaseRepresentation
bin111101000100001111101
310202122212220
413220201331
51003013041
6110515553
723002611
oct7504175
93678786
102001021
111147440
12805bb9
13550a49
143a1341
15297d66
hex1e887d

2001021 has 8 divisors (see below), whose sum is σ = 2910624. Its totient is φ = 1212720.

The previous prime is 2000989. The next prime is 2001037. The reversal of 2001021 is 1201002.

It is a happy number.

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

It is not a de Polignac number, because 2001021 - 25 = 2000989 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001421) 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, 30286 + ... + 30351.

It is an arithmetic number, because the mean of its divisors is an integer number (363828).

22001021 is an apocalyptic number.

It is an amenable number.

2001021 is a deficient number, since it is larger than the sum of its proper divisors (909603).

2001021 is a wasteful number, since it uses less digits than its factorization.

2001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60651.

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

The square root of 2001021 is about 1414.5744943268. The cubic root of 2001021 is about 126.0135409987.

Adding to 2001021 its reverse (1201002), we get a palindrome (3202023).

It can be divided in two parts, 200 and 1021, that added together give a palindrome (1221).

The spelling of 2001021 in words is "two million, one thousand, twenty-one".

Divisors: 1 3 11 33 60637 181911 667007 2001021