261212846 has 4 divisors (see below), whose sum is σ = 391819272. Its totient is φ = 130606422.

The previous prime is 261212843. The next prime is 261212867. The reversal of 261212846 is 648212162.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261212843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65303210 + ... + 65303213.

It is an arithmetic number, because the mean of its divisors is an integer number (97954818).

Almost surely, 2^261212846 is an apocalyptic number.

261212846 is a deficient number, since it is larger than the sum of its proper divisors (130606426).

261212846 is a wasteful number, since it uses less digits than its factorization.

261212846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130606425.

The product of its digits is 9216, while the sum is 32.

The square root of 261212846 is about 16162.0804972627. The cubic root of 261212846 is about 639.2413259366.

The spelling of 261212846 in words is "two hundred sixty-one million, two hundred twelve thousand, eight hundred forty-six".