721029142 has 8 divisors (see below), whose sum is σ = 1084444416. Its totient is φ = 359547672.

The previous prime is 721029131. The next prime is 721029173. The reversal of 721029142 is 241920127.

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

It is a super-2 number, since 2×721029142² = 1039766047226512328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 721029142.

It is a congruent number.

It is an unprimeable number.

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, 482518 + ... + 484009.

It is an arithmetic number, because the mean of its divisors is an integer number (135555552).

Almost surely, 2^721029142 is an apocalyptic number.

721029142 is a deficient number, since it is larger than the sum of its proper divisors (363415274).

721029142 is a wasteful number, since it uses less digits than its factorization.

721029142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966902.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 721029142 is about 26851.9858111090. The cubic root of 721029142 is about 896.7077832167.

Adding to 721029142 its reverse (241920127), we get a palindrome (962949269).

The spelling of 721029142 in words is "seven hundred twenty-one million, twenty-nine thousand, one hundred forty-two".