725512420 has 12 divisors (see below), whose sum is σ = 1523576124. Its totient is φ = 290204960.

The previous prime is 725512387. The next prime is 725512423. The reversal of 725512420 is 24215527.

It can be written as a sum of positive squares in 2 ways, for example, as 451477504 + 274034916 = 21248^2 + 16554^2 .

It is not an unprimeable number, because it can be changed into a prime (725512423) 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, 18137791 + ... + 18137830.

It is an arithmetic number, because the mean of its divisors is an integer number (126964677).

Almost surely, 2^725512420 is an apocalyptic number.

It is an amenable number.

725512420 is an abundant number, since it is smaller than the sum of its proper divisors (798063704).

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

725512420 is a wasteful number, since it uses less digits than its factorization.

725512420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36275630 (or 36275628 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 725512420 is about 26935.3377554468. The cubic root of 725512420 is about 898.5624870672.

Adding to 725512420 its reverse (24215527), we get a palindrome (749727947).

The spelling of 725512420 in words is "seven hundred twenty-five million, five hundred twelve thousand, four hundred twenty".