245404420 has 12 divisors (see below), whose sum is σ = 515349324. Its totient is φ = 98161760.

The previous prime is 245404391. The next prime is 245404421. The reversal of 245404420 is 24404542.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 71639296 + 173765124 = 8464^2 + 13182^2 .

It is not an unprimeable number, because it can be changed into a prime (245404421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6135091 + ... + 6135130.

It is an arithmetic number, because the mean of its divisors is an integer number (42945777).

Almost surely, 2^245404420 is an apocalyptic number.

245404420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245404420 is an abundant number, since it is smaller than the sum of its proper divisors (269944904).

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

245404420 is a wasteful number, since it uses less digits than its factorization.

245404420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12270230 (or 12270228 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 25.

The square root of 245404420 is about 15665.3892387007. The cubic root of 245404420 is about 626.0765828861.

Adding to 245404420 its reverse (24404542), we get a palindrome (269808962).

The spelling of 245404420 in words is "two hundred forty-five million, four hundred four thousand, four hundred twenty".