725409406 has 8 divisors (see below), whose sum is σ = 1088819424. Its totient is φ = 362469600.

The previous prime is 725409367. The next prime is 725409409. The reversal of 725409406 is 604904527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725409409) 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, 113670 + ... + 119881.

It is an arithmetic number, because the mean of its divisors is an integer number (136102428).

Almost surely, 2^725409406 is an apocalyptic number.

725409406 is a deficient number, since it is larger than the sum of its proper divisors (363410018).

725409406 is a wasteful number, since it uses less digits than its factorization.

725409406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235106.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 725409406 is about 26933.4254412616. The cubic root of 725409406 is about 898.5199567145.

The spelling of 725409406 in words is "seven hundred twenty-five million, four hundred nine thousand, four hundred six".