245630905 has 16 divisors (see below), whose sum is σ = 317966544. Its totient is φ = 181082880.

The previous prime is 245630893. The next prime is 245630927. The reversal of 245630905 is 509036542.

245630905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 1115136 + 244515769 = 1056^2 + 15637^2 .

It is not a de Polignac number, because 245630905 - 2¹⁵ = 245598137 is a prime.

It is a super-2 number, since 2×245630905² = 120669082982238050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40107 + ... + 45823.

It is an arithmetic number, because the mean of its divisors is an integer number (19872909).

Almost surely, 2^245630905 is an apocalyptic number.

It is an amenable number.

245630905 is a deficient number, since it is larger than the sum of its proper divisors (72335639).

245630905 is a wasteful number, since it uses less digits than its factorization.

245630905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6396.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 245630905 is about 15672.6164056931. The cubic root of 245630905 is about 626.2691267633.

The spelling of 245630905 in words is "two hundred forty-five million, six hundred thirty thousand, nine hundred five".