261941042 has 24 divisors (see below), whose sum is σ = 432836796. Its totient is φ = 118800000.

The previous prime is 261941023. The next prime is 261941063. The reversal of 261941042 is 240149162.

It can be written as a sum of positive squares in 2 ways, for example, as 261824761 + 116281 = 16181^2 + 341^2 .

It is a super-3 number, since 3×261941042³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 261940996 and 261941014.

It is an unprimeable number.

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, 144542 + ... + 146342.

Almost surely, 2^261941042 is an apocalyptic number.

261941042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

261941042 is a deficient number, since it is larger than the sum of its proper divisors (170895754).

261941042 is a wasteful number, since it uses less digits than its factorization.

261941042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2426 (or 2415 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 261941042 is about 16184.5927350675. The cubic root of 261941042 is about 639.8347897129.

The spelling of 261941042 in words is "two hundred sixty-one million, nine hundred forty-one thousand, forty-two".