261121324 has 12 divisors (see below), whose sum is σ = 458784648. Its totient is φ = 130040000.

The previous prime is 261121291. The next prime is 261121337. The reversal of 261121324 is 423121162.

It is a junction number, because it is equal to n+sod(n) for n = 261121295 and 261121304.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129037 + ... + 131044.

It is an arithmetic number, because the mean of its divisors is an integer number (38232054).

Almost surely, 2^261121324 is an apocalyptic number.

It is an amenable number.

261121324 is a deficient number, since it is larger than the sum of its proper divisors (197663324).

261121324 is a wasteful number, since it uses less digits than its factorization.

261121324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260336 (or 260334 counting only the distinct ones).

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

The square root of 261121324 is about 16159.2488686820. The cubic root of 261121324 is about 639.1666595235.

Adding to 261121324 its reverse (423121162), we get a palindrome (684242486).

It can be divided in two parts, 261121 and 324, that multiplied together give a square (84603204 = 9198²).

The spelling of 261121324 in words is "two hundred sixty-one million, one hundred twenty-one thousand, three hundred twenty-four".