261326412 has 60 divisors (see below), whose sum is σ = 701654800. Its totient is φ = 84750624.

The previous prime is 261326393. The next prime is 261326419. The reversal of 261326412 is 214623162.

261326412 is a `hidden beast` number, since 2 + 6 + 13 + 2 + 641 + 2 = 666.

261326412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (261326419) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1089 + ... + 22887.

Almost surely, 2^261326412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261326412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (350827400).

261326412 is an abundant number, since it is smaller than the sum of its proper divisors (440328388).

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

261326412 is a wasteful number, since it uses less digits than its factorization.

261326412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21852 (or 21841 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 261326412 is about 16165.5934626601. The cubic root of 261326412 is about 639.3339522671. Note that the first 3 decimals are identical.

Adding to 261326412 its reverse (214623162), we get a palindrome (475949574).

The spelling of 261326412 in words is "two hundred sixty-one million, three hundred twenty-six thousand, four hundred twelve".