261140413 has 16 divisors (see below), whose sum is σ = 285857280. Its totient is φ = 237828096.

The previous prime is 261140377. The next prime is 261140441. The reversal of 261140413 is 314041162.

It is a de Polignac number, because none of the positive numbers 2^k-261140413 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 (261140483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36733 + ... + 43261.

It is an arithmetic number, because the mean of its divisors is an integer number (17866080).

Almost surely, 2^261140413 is an apocalyptic number.

261140413 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

261140413 is a deficient number, since it is larger than the sum of its proper divisors (24716867).

261140413 is a wasteful number, since it uses less digits than its factorization.

261140413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6636.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 261140413 is about 16159.8395103417. The cubic root of 261140413 is about 639.1822343464.

Adding to 261140413 its reverse (314041162), we get a palindrome (575181575).

The spelling of 261140413 in words is "two hundred sixty-one million, one hundred forty thousand, four hundred thirteen".