261351124 has 6 divisors (see below), whose sum is σ = 457364474. Its totient is φ = 130675560.

The previous prime is 261351113. The next prime is 261351127. The reversal of 261351124 is 421153162.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 249324100 + 12027024 = 15790^2 + 3468^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261351127) 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 as a sum of consecutive naturals, namely, 32668887 + ... + 32668894.

Almost surely, 2^261351124 is an apocalyptic number.

It is an amenable number.

261351124 is a deficient number, since it is larger than the sum of its proper divisors (196013350).

261351124 is a wasteful number, since it uses less digits than its factorization.

261351124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65337785 (or 65337783 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 261351124 is about 16166.3577839908. The cubic root of 261351124 is about 639.3541042328.

The spelling of 261351124 in words is "two hundred sixty-one million, three hundred fifty-one thousand, one hundred twenty-four".