725198 has 4 divisors (see below), whose sum is σ = 1087800. Its totient is φ = 362598.

The previous prime is 725189. The next prime is 725201. The reversal of 725198 is 891527.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 725198.

It is an unprimeable number.

725198 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 181298 + ... + 181301.

It is an arithmetic number, because the mean of its divisors is an integer number (271950).

2⁷²⁵¹⁹⁸ is an apocalyptic number.

725198 is a deficient number, since it is larger than the sum of its proper divisors (362602).

725198 is a wasteful number, since it uses less digits than its factorization.

725198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362601.

The product of its digits is 5040, while the sum is 32.

The square root of 725198 is about 851.5855799625. The cubic root of 725198 is about 89.8432663036.

It can be divided in two parts, 72519 and 8, that added together give a palindrome (72527).

The spelling of 725198 in words is "seven hundred twenty-five thousand, one hundred ninety-eight".