201420724 has 12 divisors (see below), whose sum is σ = 357315364. Its totient is φ = 99330624.

The previous prime is 201420707. The next prime is 201420727. The reversal of 201420724 is 427024102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 106708900 + 94711824 = 10330^2 + 9732^2 .

It is a junction number, because it is equal to n+sod(n) for n = 201420695 and 201420704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201420727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344607 + ... + 345190.

Almost surely, 2^201420724 is an apocalyptic number.

It is an amenable number.

201420724 is a deficient number, since it is larger than the sum of its proper divisors (155894640).

201420724 is a wasteful number, since it uses less digits than its factorization.

201420724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689874 (or 689872 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 201420724 is about 14192.2769138711. The cubic root of 201420724 is about 586.1850223567.

Adding to 201420724 its reverse (427024102), we get a palindrome (628444826).

The spelling of 201420724 in words is "two hundred one million, four hundred twenty thousand, seven hundred twenty-four".