2021078 has 16 divisors (see below), whose sum is σ = 3125760. Its totient is φ = 979776.

The previous prime is 2021077. The next prime is 2021081. The reversal of 2021078 is 8701202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021077) 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, 15851 + ... + 15977.

It is an arithmetic number, because the mean of its divisors is an integer number (195360).

2^2021078 is an apocalyptic number.

2021078 is a deficient number, since it is larger than the sum of its proper divisors (1104682).

2021078 is a wasteful number, since it uses less digits than its factorization.

2021078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 2021078 is about 1421.6462288488. The cubic root of 2021078 is about 126.4331694049.

The spelling of 2021078 in words is "two million, twenty-one thousand, seventy-eight".