1021297 has 2 divisors, whose sum is σ = 1021298. Its totient is φ = 1021296.

The previous prime is 1021291. The next prime is 1021301. The reversal of 1021297 is 7921201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 848241 + 173056 = 921^2 + 416^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021297 - 2³ = 1021289 is a prime.

It is a super-5 number, since 5×1021297⁵ (a number of 31 digits) contains 55555 as substring.

It is not a weakly prime, because it can be changed into another prime (1021291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510648 + 510649.

It is an arithmetic number, because the mean of its divisors is an integer number (510649).

2^1021297 is an apocalyptic number.

It is an amenable number.

1021297 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021297 is an equidigital number, since it uses as much as digits as its factorization.

1021297 is an evil number, because the sum of its binary digits is even.

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

The square root of 1021297 is about 1010.5924005256. The cubic root of 1021297 is about 100.7049192130.

Adding to 1021297 its reverse (7921201), we get a palindrome (8942498).

The spelling of 1021297 in words is "one million, twenty-one thousand, two hundred ninety-seven".