261024102 has 24 divisors (see below), whose sum is σ = 590142384. Its totient is φ = 83224944.

The previous prime is 261024077. The next prime is 261024107. The reversal of 261024102 is 201420162.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261024107) 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 in 11 ways as a sum of consecutive naturals, for example, 314833 + ... + 315660.

It is an arithmetic number, because the mean of its divisors is an integer number (24589266).

Almost surely, 2^261024102 is an apocalyptic number.

261024102 is an abundant number, since it is smaller than the sum of its proper divisors (329118282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261024102 is a wasteful number, since it uses less digits than its factorization.

261024102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630524 (or 630521 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 261024102 is about 16156.2403423569. The cubic root of 261024102 is about 639.0873237652.

Adding to 261024102 its reverse (201420162), we get a palindrome (462444264).

The spelling of 261024102 in words is "two hundred sixty-one million, twenty-four thousand, one hundred two".