261419 has 4 divisors (see below), whose sum is σ = 262944. Its totient is φ = 259896.

The previous prime is 261407. The next prime is 261427. The reversal of 261419 is 914162.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 261419 - 2¹⁶ = 195883 is a prime.

It is a super-2 number, since 2×261419² = 136679787122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261394 and 261403.

It is not an unprimeable number, because it can be changed into a prime (261439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 467 + ... + 860.

It is an arithmetic number, because the mean of its divisors is an integer number (65736).

2²⁶¹⁴¹⁹ is an apocalyptic number.

261419 is a deficient number, since it is larger than the sum of its proper divisors (1525).

261419 is a wasteful number, since it uses less digits than its factorization.

261419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1524.

The product of its digits is 432, while the sum is 23.

The square root of 261419 is about 511.2915019830. The cubic root of 261419 is about 63.9409448734.

The spelling of 261419 in words is "two hundred sixty-one thousand, four hundred nineteen".