721122042 has 8 divisors (see below), whose sum is σ = 1442244096. Its totient is φ = 240374012.

The previous prime is 721122041. The next prime is 721122107. The reversal of 721122042 is 240221127.

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

721122042 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (721122041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60093498 + ... + 60093509.

It is an arithmetic number, because the mean of its divisors is an integer number (180280512).

Almost surely, 2^721122042 is an apocalyptic number.

721122042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

721122042 is a wasteful number, since it uses less digits than its factorization.

721122042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120187012.

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 721122042 is about 26853.7156088315. The cubic root of 721122042 is about 896.7462932532.

Adding to 721122042 its reverse (240221127), we get a palindrome (961343169).

The spelling of 721122042 in words is "seven hundred twenty-one million, one hundred twenty-two thousand, forty-two".