261453413 has 4 divisors (see below), whose sum is σ = 281565228. Its totient is φ = 241341600.

The previous prime is 261453407. The next prime is 261453427. The reversal of 261453413 is 314354162.

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

It can be written as a sum of positive squares in 2 ways, for example, as 28494244 + 232959169 = 5338^2 + 15263^2 .

It is a cyclic number.

It is not a de Polignac number, because 261453413 - 2¹⁸ = 261191269 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 (261453113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10055888 + ... + 10055913.

It is an arithmetic number, because the mean of its divisors is an integer number (70391307).

Almost surely, 2^261453413 is an apocalyptic number.

It is an amenable number.

261453413 is a deficient number, since it is larger than the sum of its proper divisors (20111815).

261453413 is a wasteful number, since it uses less digits than its factorization.

261453413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20111814.

The product of its digits is 8640, while the sum is 29.

The square root of 261453413 is about 16169.5211122655. The cubic root of 261453413 is about 639.4375046289.

The spelling of 261453413 in words is "two hundred sixty-one million, four hundred fifty-three thousand, four hundred thirteen".