245056649 has 4 divisors (see below), whose sum is σ = 259471764. Its totient is φ = 230641536.

The previous prime is 245056619. The next prime is 245056681. The reversal of 245056649 is 946650542.

It is a happy number.

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 179560000 + 65496649 = 13400^2 + 8093^2 .

It is a cyclic number.

It is not a de Polignac number, because 245056649 - 2⁸ = 245056393 is a prime.

It is a super-2 number, since 2×245056649² = 120105522438218402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245056619) 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, 7207532 + ... + 7207565.

It is an arithmetic number, because the mean of its divisors is an integer number (64867941).

Almost surely, 2^245056649 is an apocalyptic number.

It is an amenable number.

245056649 is a deficient number, since it is larger than the sum of its proper divisors (14415115).

245056649 is a wasteful number, since it uses less digits than its factorization.

245056649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14415114.

The product of its (nonzero) digits is 259200, while the sum is 41.

The square root of 245056649 is about 15654.2853238339. The cubic root of 245056649 is about 625.7806982237.

The spelling of 245056649 in words is "two hundred forty-five million, fifty-six thousand, six hundred forty-nine".