720061 has 4 divisors (see below), whose sum is σ = 751392. Its totient is φ = 688732.

The previous prime is 720059. The next prime is 720089. The reversal of 720061 is 160027.

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, and also an emirpimes, since its reverse is a distinct semiprime: 160027 = 7 ⋅22861.

It is a cyclic number.

It is not a de Polignac number, because 720061 - 2¹ = 720059 is a prime.

It is a Duffinian number.

720061 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720091) 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, 15631 + ... + 15676.

It is an arithmetic number, because the mean of its divisors is an integer number (187848).

2⁷²⁰⁰⁶¹ is an apocalyptic number.

It is an amenable number.

720061 is a deficient number, since it is larger than the sum of its proper divisors (31331).

720061 is a wasteful number, since it uses less digits than its factorization.

720061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31330.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 720061 is about 848.5640812573. The cubic root of 720061 is about 89.6306260235.

Adding to 720061 its reverse (160027), we get a palindrome (880088).

The spelling of 720061 in words is "seven hundred twenty thousand, sixty-one".