245566041 has 32 divisors (see below), whose sum is σ = 383201280. Its totient is φ = 136988544.

The previous prime is 245565989. The next prime is 245566081. The reversal of 245566041 is 140665542.

245566041 is a nontrivial binomial coefficient, being equal to C(22162, 2).

It is not a de Polignac number, because 245566041 - 2⁷ = 245565913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 245565993 and 245566011.

It is not an unprimeable number, because it can be changed into a prime (245566081) 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 31 ways as a sum of consecutive naturals, for example, 154336 + ... + 155918.

It is an arithmetic number, because the mean of its divisors is an integer number (11975040).

Almost surely, 2^245566041 is an apocalyptic number.

245566041 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

245566041 is the 22161-st triangular number and also the 11081-st hexagonal number.

It is an amenable number.

245566041 is a deficient number, since it is larger than the sum of its proper divisors (137635239).

245566041 is a wasteful number, since it uses less digits than its factorization.

245566041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1765.

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 245566041 is about 15670.5469272773. The cubic root of 245566041 is about 626.2139954042.

The spelling of 245566041 in words is "two hundred forty-five million, five hundred sixty-six thousand, forty-one".