261348401 has 4 divisors (see below), whose sum is σ = 275103600. Its totient is φ = 247593204.

The previous prime is 261348359. The next prime is 261348419. The reversal of 261348401 is 104843162.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 261348401 - 2¹⁰ = 261347377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261348481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6877571 + ... + 6877608.

It is an arithmetic number, because the mean of its divisors is an integer number (68775900).

Almost surely, 2^261348401 is an apocalyptic number.

It is an amenable number.

261348401 is a deficient number, since it is larger than the sum of its proper divisors (13755199).

261348401 is a wasteful number, since it uses less digits than its factorization.

261348401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13755198.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 261348401 is about 16166.2735656675. The cubic root of 261348401 is about 639.3518837625.

The spelling of 261348401 in words is "two hundred sixty-one million, three hundred forty-eight thousand, four hundred one".