721341052 has 12 divisors (see below), whose sum is σ = 1266382096. Its totient is φ = 359517600.

The previous prime is 721341029. The next prime is 721341073. The reversal of 721341052 is 250143127.

It is a happy number.

It is a super-3 number, since 3×721341052³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286824 + ... + 289327.

Almost surely, 2^721341052 is an apocalyptic number.

It is an amenable number.

721341052 is a deficient number, since it is larger than the sum of its proper divisors (545041044).

721341052 is a wasteful number, since it uses less digits than its factorization.

721341052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576468 (or 576466 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 721341052 is about 26857.7931334650. The cubic root of 721341052 is about 896.8370668510.

Adding to 721341052 its reverse (250143127), we get a palindrome (971484179).

The spelling of 721341052 in words is "seven hundred twenty-one million, three hundred forty-one thousand, fifty-two".