261142326 has 64 divisors (see below), whose sum is σ = 602357760. Its totient is φ = 83773440.

The previous prime is 261142307. The next prime is 261142363. The reversal of 261142326 is 623241162.

261142326 is a `hidden beast` number, since 2 + 611 + 4 + 23 + 26 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 261142326.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 429915 + ... + 430521.

It is an arithmetic number, because the mean of its divisors is an integer number (9411840).

Almost surely, 2^261142326 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261142326, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301178880).

261142326 is an abundant number, since it is smaller than the sum of its proper divisors (341215434).

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

261142326 is a wasteful number, since it uses less digits than its factorization.

261142326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906 (or 900 counting only the distinct ones).

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

The square root of 261142326 is about 16159.8987001775. The cubic root of 261142326 is about 639.1837951320.

Adding to 261142326 its reverse (623241162), we get a palindrome (884383488).

The spelling of 261142326 in words is "two hundred sixty-one million, one hundred forty-two thousand, three hundred twenty-six".