725138801 has 4 divisors (see below), whose sum is σ = 725365104. Its totient is φ = 724912500.

The previous prime is 725138773. The next prime is 725138807. The reversal of 725138801 is 108831527.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 725138801 - 2⁶ = 725138737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (725138807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108275 + ... + 114776.

It is an arithmetic number, because the mean of its divisors is an integer number (181341276).

Almost surely, 2^725138801 is an apocalyptic number.

It is an amenable number.

725138801 is a deficient number, since it is larger than the sum of its proper divisors (226303).

725138801 is a wasteful number, since it uses less digits than its factorization.

725138801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226302.

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 725138801 is about 26928.4013821838. The cubic root of 725138801 is about 898.4082155693.

The spelling of 725138801 in words is "seven hundred twenty-five million, one hundred thirty-eight thousand, eight hundred one".