245218420 has 12 divisors (see below), whose sum is σ = 514958724. Its totient is φ = 98087360.

The previous prime is 245218409. The next prime is 245218423. The reversal of 245218420 is 24812542.

245218420 is digitally balanced in base 3, 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 2 ways, for example, as 29833444 + 215384976 = 5462^2 + 14676^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245218423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6130441 + ... + 6130480.

It is an arithmetic number, because the mean of its divisors is an integer number (42913227).

Almost surely, 2^245218420 is an apocalyptic number.

245218420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245218420 is an abundant number, since it is smaller than the sum of its proper divisors (269740304).

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

245218420 is a wasteful number, since it uses less digits than its factorization.

245218420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12260930 (or 12260928 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 245218420 is about 15659.4514591029. The cubic root of 245218420 is about 625.9183682985.

The spelling of 245218420 in words is "two hundred forty-five million, two hundred eighteen thousand, four hundred twenty".