245405845 has 8 divisors (see below), whose sum is σ = 295019064. Its totient is φ = 195969984.

The previous prime is 245405833. The next prime is 245405857. The reversal of 245405845 is 548504542.

It is an interprime number because it is at equal distance from previous prime (245405833) and next prime (245405857).

It can be written as a sum of positive squares in 4 ways, for example, as 26306641 + 219099204 = 5129^2 + 14802^2 .

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 245405845 - 2⁵ = 245405813 is a prime.

It is a Duffinian number.

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, 41274 + ... + 46843.

It is an arithmetic number, because the mean of its divisors is an integer number (36877383).

Almost surely, 2^245405845 is an apocalyptic number.

It is an amenable number.

245405845 is a deficient number, since it is larger than the sum of its proper divisors (49613219).

245405845 is an equidigital number, since it uses as much as digits as its factorization.

245405845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88679.

The product of its (nonzero) digits is 128000, while the sum is 37.

The square root of 245405845 is about 15665.4347210666. The cubic root of 245405845 is about 626.0777947053.

The spelling of 245405845 in words is "two hundred forty-five million, four hundred five thousand, eight hundred forty-five".