261450245 has 8 divisors (see below), whose sum is σ = 358560384. Its totient is φ = 179280144.

The previous prime is 261450221. The next prime is 261450253. The reversal of 261450245 is 542054162.

261450245 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261450245 - 2¹⁸ = 261188101 is a prime.

It is a super-2 number, since 2×261450245² = 136712461221120050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3734969 + ... + 3735038.

It is an arithmetic number, because the mean of its divisors is an integer number (44820048).

Almost surely, 2^261450245 is an apocalyptic number.

It is an amenable number.

261450245 is a deficient number, since it is larger than the sum of its proper divisors (97110139).

261450245 is an equidigital number, since it uses as much as digits as its factorization.

261450245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7470019.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 261450245 is about 16169.4231498839. The cubic root of 261450245 is about 639.4349219556.

The spelling of 261450245 in words is "two hundred sixty-one million, four hundred fifty thousand, two hundred forty-five".