261422341 has 4 divisors (see below), whose sum is σ = 266354892. Its totient is φ = 256489792.

The previous prime is 261422309. The next prime is 261422377. The reversal of 261422341 is 143224162.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 143224162 = 2 ⋅71612081.

It can be written as a sum of positive squares in 2 ways, for example, as 116316225 + 145106116 = 10785^2 + 12046^2 .

It is a cyclic number.

It is not a de Polignac number, because 261422341 - 2⁵ = 261422309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261422041) 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, 2466196 + ... + 2466301.

It is an arithmetic number, because the mean of its divisors is an integer number (66588723).

Almost surely, 2^261422341 is an apocalyptic number.

It is an amenable number.

261422341 is a deficient number, since it is larger than the sum of its proper divisors (4932551).

261422341 is an equidigital number, since it uses as much as digits as its factorization.

261422341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4932550.

The product of its digits is 2304, while the sum is 25.

The square root of 261422341 is about 16168.5602636722. The cubic root of 261422341 is about 639.4121726599.

The spelling of 261422341 in words is "two hundred sixty-one million, four hundred twenty-two thousand, three hundred forty-one".