245424420 has 36 divisors (see below), whose sum is σ = 744454620. Its totient is φ = 65446464.

The previous prime is 245424391. The next prime is 245424449. The reversal of 245424420 is 24424542.

It is an interprime number because it is at equal distance from previous prime (245424391) and next prime (245424449).

It can be written as a sum of positive squares in 2 ways, for example, as 175668516 + 69755904 = 13254^2 + 8352^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 681555 + ... + 681914.

It is an arithmetic number, because the mean of its divisors is an integer number (20679295).

Almost surely, 2^245424420 is an apocalyptic number.

245424420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245424420 is an abundant number, since it is smaller than the sum of its proper divisors (499030200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

245424420 is a wasteful number, since it uses less digits than its factorization.

245424420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363484 (or 1363479 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 27.

The square root of 245424420 is about 15666.0275756172. The cubic root of 245424420 is about 626.0935904465.

Adding to 245424420 its reverse (24424542), we get a palindrome (269848962).

The spelling of 245424420 in words is "two hundred forty-five million, four hundred twenty-four thousand, four hundred twenty".