1027745221 has 4 divisors (see below), whose sum is σ = 1033899552. Its totient is φ = 1021590892.

The previous prime is 1027745219. The next prime is 1027745233. The reversal of 1027745221 is 1225477201.

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 1027745221 - 2¹ = 1027745219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1027745281) 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, 3076915 + ... + 3077248.

It is an arithmetic number, because the mean of its divisors is an integer number (258474888).

Almost surely, 2^1027745221 is an apocalyptic number.

It is an amenable number.

1027745221 is a deficient number, since it is larger than the sum of its proper divisors (6154331).

1027745221 is an equidigital number, since it uses as much as digits as its factorization.

1027745221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6154330.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 1027745221 is about 32058.4656682131. The cubic root of 1027745221 is about 1009.1641684745.

The spelling of 1027745221 in words is "one billion, twenty-seven million, seven hundred forty-five thousand, two hundred twenty-one".