2026245721 has 4 divisors (see below), whose sum is σ = 2027407312. Its totient is φ = 2025084132.

The previous prime is 2026245713. The next prime is 2026245731. The reversal of 2026245721 is 1275426202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2026245721 - 2³ = 2026245713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2026245731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 578175 + ... + 581668.

It is an arithmetic number, because the mean of its divisors is an integer number (506851828).

Almost surely, 2^2026245721 is an apocalyptic number.

It is an amenable number.

2026245721 is a deficient number, since it is larger than the sum of its proper divisors (1161591).

2026245721 is a wasteful number, since it uses less digits than its factorization.

2026245721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161590.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 2026245721 is about 45013.8392164010. The cubic root of 2026245721 is about 1265.4083723742.

The spelling of 2026245721 in words is "two billion, twenty-six million, two hundred forty-five thousand, seven hundred twenty-one".