1025740261 has 12 divisors (see below), whose sum is σ = 1269387552. Its totient is φ = 811573776.

The previous prime is 1025740253. The next prime is 1025740273. The reversal of 1025740261 is 1620475201.

It is not a de Polignac number, because 1025740261 - 2³ = 1025740253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025740231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 432351 + ... + 434716.

It is an arithmetic number, because the mean of its divisors is an integer number (105782296).

Almost surely, 2^1025740261 is an apocalyptic number.

It is an amenable number.

1025740261 is a deficient number, since it is larger than the sum of its proper divisors (243647291).

1025740261 is an equidigital number, since it uses as much as digits as its factorization.

1025740261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867100 (or 867087 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 1025740261 is about 32027.1800350889. The cubic root of 1025740261 is about 1008.5075041226.

The spelling of 1025740261 in words is "one billion, twenty-five million, seven hundred forty thousand, two hundred sixty-one".