1021259 has 2 divisors, whose sum is σ = 1021260. Its totient is φ = 1021258.

The previous prime is 1021253. The next prime is 1021261. The reversal of 1021259 is 9521201.

It is a strong prime.

It is an emirp because it is prime and its reverse (9521201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1021259 - 2⁴ = 1021243 is a prime.

Together with 1021261, it forms a pair of twin primes.

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 1021259.

It is not a weakly prime, because it can be changed into another prime (1021253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510629 + 510630.

It is an arithmetic number, because the mean of its divisors is an integer number (510630).

2^1021259 is an apocalyptic number.

1021259 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021259 is an equidigital number, since it uses as much as digits as its factorization.

1021259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1021259 is about 1010.5735994968. The cubic root of 1021259 is about 100.7036702017.

The spelling of 1021259 in words is "one million, twenty-one thousand, two hundred fifty-nine".