725450578 has 4 divisors (see below), whose sum is σ = 1088175870. Its totient is φ = 362725288.

The previous prime is 725450569. The next prime is 725450581. The reversal of 725450578 is 875054527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 875054527 = 23 ⋅38045849.

It can be written as a sum of positive squares in only one way, i.e., 650403009 + 75047569 = 25503^2 + 8663^2 .

It is a super-2 number, since 2×725450578² = 1052557082241068168, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 181362643 + ... + 181362646.

Almost surely, 2^725450578 is an apocalyptic number.

725450578 is a deficient number, since it is larger than the sum of its proper divisors (362725292).

725450578 is a wasteful number, since it uses less digits than its factorization.

725450578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362725291.

The product of its (nonzero) digits is 392000, while the sum is 43.

The square root of 725450578 is about 26934.1897594860. The cubic root of 725450578 is about 898.5369554665.

The spelling of 725450578 in words is "seven hundred twenty-five million, four hundred fifty thousand, five hundred seventy-eight".