1027421 has 2 divisors, whose sum is σ = 1027422. Its totient is φ = 1027420.

The previous prime is 1027417. The next prime is 1027427. The reversal of 1027421 is 1247201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 972196 + 55225 = 986^2 + 235^2 .

It is a cyclic number.

It is not a de Polignac number, because 1027421 - 2² = 1027417 is a prime.

It is a super-2 number, since 2×1027421² = 2111187822482, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1027421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1027427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 513710 + 513711.

It is an arithmetic number, because the mean of its divisors is an integer number (513711).

2^1027421 is an apocalyptic number.

It is an amenable number.

1027421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1027421 is an equidigital number, since it uses as much as digits as its factorization.

1027421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 1027421 is about 1013.6177780603. The cubic root of 1027421 is about 100.9058037558.

The spelling of 1027421 in words is "one million, twenty-seven thousand, four hundred twenty-one".