721150401 has 8 divisors (see below), whose sum is σ = 962239680. Its totient is φ = 480414032.

The previous prime is 721150393. The next prime is 721150411. The reversal of 721150401 is 104051127.

It is a happy number.

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 721150401 - 2³ = 721150393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (721150411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83421 + ... + 91658.

It is an arithmetic number, because the mean of its divisors is an integer number (120279960).

Almost surely, 2^721150401 is an apocalyptic number.

It is an amenable number.

721150401 is a deficient number, since it is larger than the sum of its proper divisors (241089279).

721150401 is a wasteful number, since it uses less digits than its factorization.

721150401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176455.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 721150401 is about 26854.2436311284. The cubic root of 721150401 is about 896.7580483114.

The spelling of 721150401 in words is "seven hundred twenty-one million, one hundred fifty thousand, four hundred one".