725578381 has 8 divisors (see below), whose sum is σ = 794464128. Its totient is φ = 657180000.

The previous prime is 725578369. The next prime is 725578391. The reversal of 725578381 is 183875527.

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

It is a cyclic number.

It is not a de Polignac number, because 725578381 - 2¹¹ = 725576333 is a prime.

It is a super-2 number, since 2×725578381² = 1052927973949162322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725578361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118720 + ... + 124681.

It is an arithmetic number, because the mean of its divisors is an integer number (99308016).

Almost surely, 2^725578381 is an apocalyptic number.

It is an amenable number.

725578381 is a deficient number, since it is larger than the sum of its proper divisors (68885747).

725578381 is a wasteful number, since it uses less digits than its factorization.

725578381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243683.

The product of its digits is 470400, while the sum is 46.

The square root of 725578381 is about 26936.5621600085. The cubic root of 725578381 is about 898.5897176068.

The spelling of 725578381 in words is "seven hundred twenty-five million, five hundred seventy-eight thousand, three hundred eighty-one".