261024502 has 4 divisors (see below), whose sum is σ = 391536756. Its totient is φ = 130512250.

The previous prime is 261024487. The next prime is 261024503. The reversal of 261024502 is 205420162.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261024503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65256124 + ... + 65256127.

It is an arithmetic number, because the mean of its divisors is an integer number (97884189).

Almost surely, 2^261024502 is an apocalyptic number.

261024502 is a deficient number, since it is larger than the sum of its proper divisors (130512254).

261024502 is a wasteful number, since it uses less digits than its factorization.

261024502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130512253.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 261024502 is about 16156.2527214698. The cubic root of 261024502 is about 639.0876502163.

Adding to 261024502 its reverse (205420162), we get a palindrome (466444664).

The spelling of 261024502 in words is "two hundred sixty-one million, twenty-four thousand, five hundred two".