1040135261 has 8 divisors (see below), whose sum is σ = 1140073248. Its totient is φ = 941094000.

The previous prime is 1040135227. The next prime is 1040135287. The reversal of 1040135261 is 1625310401.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1040135261 - 2¹⁰ = 1040134237 is a prime.

It is a super-2 number, since 2×1040135261² = 2163762722351076242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1040134261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221750 + ... + 226391.

It is an arithmetic number, because the mean of its divisors is an integer number (142509156).

Almost surely, 2^1040135261 is an apocalyptic number.

1040135261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1040135261 is a deficient number, since it is larger than the sum of its proper divisors (99937987).

1040135261 is a wasteful number, since it uses less digits than its factorization.

1040135261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448363.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1040135261 is about 32251.1280577905. The cubic root of 1040135261 is about 1013.2033252988.

Adding to 1040135261 its reverse (1625310401), we get a palindrome (2665445662).

The spelling of 1040135261 in words is "one billion, forty million, one hundred thirty-five thousand, two hundred sixty-one".