720146 has 8 divisors (see below), whose sum is σ = 1234560. Its totient is φ = 308628.

The previous prime is 720133. The next prime is 720151. The reversal of 720146 is 641027.

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

It is a super-2 number, since 2×720146² = 1037220522632, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25706 + ... + 25733.

It is an arithmetic number, because the mean of its divisors is an integer number (154320).

2⁷²⁰¹⁴⁶ is an apocalyptic number.

720146 is a deficient number, since it is larger than the sum of its proper divisors (514414).

720146 is a wasteful number, since it uses less digits than its factorization.

720146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51448.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 720146 is about 848.6141643880. The cubic root of 720146 is about 89.6341527170.

The spelling of 720146 in words is "seven hundred twenty thousand, one hundred forty-six".