720401601 has 8 divisors (see below), whose sum is σ = 969348160. Its totient is φ = 475861392.

The previous prime is 720401597. The next prime is 720401603. The reversal of 720401601 is 106104027.

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

It is not a de Polignac number, because 720401601 - 2² = 720401597 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720401603) 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, 1101205 + ... + 1101858.

It is an arithmetic number, because the mean of its divisors is an integer number (121168520).

Almost surely, 2^720401601 is an apocalyptic number.

It is an amenable number.

720401601 is a deficient number, since it is larger than the sum of its proper divisors (248946559).

720401601 is a wasteful number, since it uses less digits than its factorization.

720401601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2203175.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 720401601 is about 26840.2980795669. The cubic root of 720401601 is about 896.4475606182.

Adding to 720401601 its reverse (106104027), we get a palindrome (826505628).

The spelling of 720401601 in words is "seven hundred twenty million, four hundred one thousand, six hundred one".