1020457 has 2 divisors, whose sum is σ = 1020458. Its totient is φ = 1020456.

The previous prime is 1020451. The next prime is 1020491. The reversal of 1020457 is 7540201.

1020457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 793881 + 226576 = 891^2 + 476^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020457 - 2⁷ = 1020329 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510228 + 510229.

It is an arithmetic number, because the mean of its divisors is an integer number (510229).

2^1020457 is an apocalyptic number.

It is an amenable number.

1020457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020457 is an equidigital number, since it uses as much as digits as its factorization.

1020457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 1020457 is about 1010.1767172134. The cubic root of 1020457 is about 100.6773022597.

Adding to 1020457 its reverse (7540201), we get a palindrome (8560658).

The spelling of 1020457 in words is "one million, twenty thousand, four hundred fifty-seven".