261862604 has 12 divisors (see below), whose sum is σ = 468917064. Its totient is φ = 127886304.

The previous prime is 261862603. The next prime is 261862619. The reversal of 261862604 is 406268162.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (261862603) 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 3 ways as a sum of consecutive naturals, for example, 761057 + ... + 761400.

It is an arithmetic number, because the mean of its divisors is an integer number (39076422).

Almost surely, 2^261862604 is an apocalyptic number.

It is an amenable number.

261862604 is a deficient number, since it is larger than the sum of its proper divisors (207054460).

261862604 is a wasteful number, since it uses less digits than its factorization.

261862604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522504 (or 1522502 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 261862604 is about 16182.1693230543. The cubic root of 261862604 is about 639.7709173605.

The spelling of 261862604 in words is "two hundred sixty-one million, eight hundred sixty-two thousand, six hundred four".