261602812 has 12 divisors (see below), whose sum is σ = 463600480. Its totient is φ = 129145536.

The previous prime is 261602791. The next prime is 261602821. The reversal of 261602812 is 218206162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 413613 + ... + 414244.

Almost surely, 2^261602812 is an apocalyptic number.

It is an amenable number.

261602812 is a deficient number, since it is larger than the sum of its proper divisors (201997668).

261602812 is a wasteful number, since it uses less digits than its factorization.

261602812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827940 (or 827938 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 261602812 is about 16174.1402244447. The cubic root of 261602812 is about 639.5592766524.

Adding to 261602812 its reverse (218206162), we get a palindrome (479808974).

The spelling of 261602812 in words is "two hundred sixty-one million, six hundred two thousand, eight hundred twelve".