1025015261 has 2 divisors, whose sum is σ = 1025015262. Its totient is φ = 1025015260.

The previous prime is 1025015213. The next prime is 1025015267. The reversal of 1025015261 is 1625105201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 572644900 + 452370361 = 23930^2 + 21269^2 .

It is a cyclic number.

It is not a de Polignac number, because 1025015261 - 2¹⁸ = 1024753117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1025015267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512507630 + 512507631.

It is an arithmetic number, because the mean of its divisors is an integer number (512507631).

Almost surely, 2^1025015261 is an apocalyptic number.

It is an amenable number.

1025015261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025015261 is an equidigital number, since it uses as much as digits as its factorization.

1025015261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1025015261 is about 32015.8595230551. The cubic root of 1025015261 is about 1008.2698415288.

The spelling of 1025015261 in words is "one billion, twenty-five million, fifteen thousand, two hundred sixty-one".