1025424640 has 144 divisors (see below), whose sum is σ = 2609582976. Its totient is φ = 385228800.

The previous prime is 1025424613. The next prime is 1025424641. The reversal of 1025424640 is 464245201.

1025424640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1025424599 and 1025424608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025424641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1795555 + ... + 1796125.

It is an arithmetic number, because the mean of its divisors is an integer number (18122104).

Almost surely, 2^1025424640 is an apocalyptic number.

1025424640 is a gapful number since it is divisible by the number (10) 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 1025424640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1304791488).

1025424640 is an abundant number, since it is smaller than the sum of its proper divisors (1584158336).

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

1025424640 is an equidigital number, since it uses as much as digits as its factorization.

1025424640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676 (or 662 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 1025424640 is about 32022.2522630748. The cubic root of 1025424640 is about 1008.4040540218.

Adding to 1025424640 its reverse (464245201), we get a palindrome (1489669841).

The spelling of 1025424640 in words is "one billion, twenty-five million, four hundred twenty-four thousand, six hundred forty".