2051021 has 8 divisors (see below), whose sum is σ = 2407680.
Its totient is φ = 1710288.
The previous prime is 2050987. The next prime is 2051041. The reversal of 2051021 is 1201502.
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 2051021 - 26 = 2050957 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 2050993 and 2051011.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2051041) 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, 3701 + ... + 4218.
It is an arithmetic number, because the mean of its divisors is an integer number (300960).
22051021 is an apocalyptic number.
It is an amenable number.
2051021 is a deficient number, since it is larger than the sum of its proper divisors (356659).
2051021 is an equidigital number, since it uses as much as digits as its factorization.
2051021 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 7963.
The product of its (nonzero) digits is 20, while the sum is 11.
The square root of 2051021 is about 1432.1386106100.
The cubic root of 2051021 is about 127.0544953885.
Adding to 2051021 its reverse (1201502), we get a palindrome (3252523).
The spelling of 2051021 in words is "two million, fifty-one thousand, twenty-one".