261977012 has 12 divisors (see below), whose sum is σ = 500138016. Its totient is φ = 119080440.

The previous prime is 261976999. The next prime is 261977059. The reversal of 261977012 is 210779162.

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, 2976968 + ... + 2977055.

It is an arithmetic number, because the mean of its divisors is an integer number (41678168).

Almost surely, 2^261977012 is an apocalyptic number.

261977012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

261977012 is a deficient number, since it is larger than the sum of its proper divisors (238161004).

261977012 is a wasteful number, since it uses less digits than its factorization.

261977012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5954038 (or 5954036 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 261977012 is about 16185.7039389703. The cubic root of 261977012 is about 639.8640759520.

The spelling of 261977012 in words is "two hundred sixty-one million, nine hundred seventy-seven thousand, twelve".