1026495261 has 20 divisors (see below), whose sum is σ = 1672808544. Its totient is φ = 622117800.

The previous prime is 1026495259. The next prime is 1026495263. The reversal of 1026495261 is 1625946201.

1026495261 is a `hidden beast` number, since 1 + 0 + 2 + 649 + 5 + 2 + 6 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (1026495259) and next prime (1026495263).

It is not a de Polignac number, because 1026495261 - 2¹ = 1026495259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1026495263) 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 19 ways as a sum of consecutive naturals, for example, 575145 + ... + 576926.

Almost surely, 2^1026495261 is an apocalyptic number.

1026495261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1026495261 is a deficient number, since it is larger than the sum of its proper divisors (646313283).

1026495261 is a wasteful number, since it uses less digits than its factorization.

1026495261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152094 (or 1152085 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 1026495261 is about 32038.9647304653. The cubic root of 1026495261 is about 1008.7548820261.

The spelling of 1026495261 in words is "one billion, twenty-six million, four hundred ninety-five thousand, two hundred sixty-one".