201402721 has 8 divisors (see below), whose sum is σ = 217705320. Its totient is φ = 185215872.

The previous prime is 201402659. The next prime is 201402727. The reversal of 201402721 is 127204102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10962721 + 190440000 = 3311^2 + 13800^2 .

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 201402721 - 2²⁷ = 67184993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201402727) 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, 25300 + ... + 32293.

It is an arithmetic number, because the mean of its divisors is an integer number (27213165).

Almost surely, 2^201402721 is an apocalyptic number.

It is an amenable number.

201402721 is a deficient number, since it is larger than the sum of its proper divisors (16302599).

201402721 is a wasteful number, since it uses less digits than its factorization.

201402721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57875.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 201402721 is about 14191.6426462901. The cubic root of 201402721 is about 586.1675574153.

Adding to 201402721 its reverse (127204102), we get a palindrome (328606823).

The spelling of 201402721 in words is "two hundred one million, four hundred two thousand, seven hundred twenty-one".