245143020 has 96 divisors (see below), whose sum is σ = 706019328. Its totient is φ = 63528192.

The previous prime is 245143013. The next prime is 245143021. The reversal of 245143020 is 20341542.

It is not an unprimeable number, because it can be changed into a prime (245143021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 403557 + ... + 404163.

It is an arithmetic number, because the mean of its divisors is an integer number (7354368).

Almost surely, 2^245143020 is an apocalyptic number.

245143020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 245143020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (353009664).

245143020 is an abundant number, since it is smaller than the sum of its proper divisors (460876308).

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

245143020 is a wasteful number, since it uses less digits than its factorization.

245143020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799 (or 797 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 245143020 is about 15657.0437822726. The cubic root of 245143020 is about 625.8542090578.

Adding to 245143020 its reverse (20341542), we get a palindrome (265484562).

The spelling of 245143020 in words is "two hundred forty-five million, one hundred forty-three thousand, twenty".