261346423 has 16 divisors (see below), whose sum is σ = 305284896. Its totient is φ = 221506560.

The previous prime is 261346417. The next prime is 261346427. The reversal of 261346423 is 324643162.

It is a cyclic number.

It is not a de Polignac number, because 261346423 - 2¹⁷ = 261215351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261346427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5361 + ... + 23482.

It is an arithmetic number, because the mean of its divisors is an integer number (19080306).

Almost surely, 2^261346423 is an apocalyptic number.

261346423 is a deficient number, since it is larger than the sum of its proper divisors (43938473).

261346423 is a wasteful number, since it uses less digits than its factorization.

261346423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28914.

The product of its digits is 20736, while the sum is 31.

The square root of 261346423 is about 16166.2123888065. The cubic root of 261346423 is about 639.3502707927.

Adding to 261346423 its reverse (324643162), we get a palindrome (585989585).

The spelling of 261346423 in words is "two hundred sixty-one million, three hundred forty-six thousand, four hundred twenty-three".