1027921 has 4 divisors (see below), whose sum is σ = 1029952. Its totient is φ = 1025892.

The previous prime is 1027891. The next prime is 1027931. The reversal of 1027921 is 1297201.

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 1027921 - 2⁹ = 1027409 is a prime.

It is a Duffinian number.

1027921 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1027892 and 1027901.

It is not an unprimeable number, because it can be changed into a prime (1027931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 436 + ... + 1498.

It is an arithmetic number, because the mean of its divisors is an integer number (257488).

2^1027921 is an apocalyptic number.

It is an amenable number.

1027921 is a deficient number, since it is larger than the sum of its proper divisors (2031).

1027921 is an equidigital number, since it uses as much as digits as its factorization.

1027921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2030.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 1027921 is about 1013.8643893539. The cubic root of 1027921 is about 100.9221698866.

The spelling of 1027921 in words is "one million, twenty-seven thousand, nine hundred twenty-one".