261741481 has 4 divisors (see below), whose sum is σ = 261797200. Its totient is φ = 261685764.

The previous prime is 261741479. The next prime is 261741517. The reversal of 261741481 is 184147162.

It is a happy number.

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 261741481 - 2¹ = 261741479 is a prime.

It is a super-2 number, since 2×261741481² = 137017205752146722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261741421) 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, 20091 + ... + 30448.

It is an arithmetic number, because the mean of its divisors is an integer number (65449300).

Almost surely, 2^261741481 is an apocalyptic number.

It is an amenable number.

261741481 is a deficient number, since it is larger than the sum of its proper divisors (55719).

261741481 is an equidigital number, since it uses as much as digits as its factorization.

261741481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55718.

The product of its digits is 10752, while the sum is 34.

The square root of 261741481 is about 16178.4264067925. The cubic root of 261741481 is about 639.6722613957.

The spelling of 261741481 in words is "two hundred sixty-one million, seven hundred forty-one thousand, four hundred eighty-one".