261354612 has 48 divisors (see below), whose sum is σ = 658304640. Its totient is φ = 80454528.

The previous prime is 261354553. The next prime is 261354629. The reversal of 261354612 is 216453162.

It is a self number, because there is not a number n which added to its sum of digits gives 261354612.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 8323 + ... + 24330.

It is an arithmetic number, because the mean of its divisors is an integer number (13714680).

Almost surely, 2^261354612 is an apocalyptic number.

It is an amenable number.

261354612 is an abundant number, since it is smaller than the sum of its proper divisors (396950028).

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

261354612 is a wasteful number, since it uses less digits than its factorization.

261354612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32712 (or 32710 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 261354612 is about 16166.4656619807. The cubic root of 261354612 is about 639.3569484999.

The spelling of 261354612 in words is "two hundred sixty-one million, three hundred fifty-four thousand, six hundred twelve".