1025261 has 2 divisors, whose sum is σ = 1025262. Its totient is φ = 1025260.

The previous prime is 1025257. The next prime is 1025267. The reversal of 1025261 is 1625201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1012036 + 13225 = 1006^2 + 115^2 .

It is an emirp because it is prime and its reverse (1625201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1025261 - 2² = 1025257 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1025267) 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 as a sum of consecutive naturals, namely, 512630 + 512631.

It is an arithmetic number, because the mean of its divisors is an integer number (512631).

2^1025261 is an apocalyptic number.

It is an amenable number.

1025261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025261 is an equidigital number, since it uses as much as digits as its factorization.

1025261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1025261 is about 1012.5517270737. The cubic root of 1025261 is about 100.8350409898.

The spelling of 1025261 in words is "one million, twenty-five thousand, two hundred sixty-one".