722621042 has 16 divisors (see below), whose sum is σ = 1273430592. Its totient is φ = 303197520.

The previous prime is 722621017. The next prime is 722621051. The reversal of 722621042 is 240126227.

It is a Harshad number since it is a multiple of its sum of digits (26).

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 7 ways as a sum of consecutive naturals, for example, 1263038 + ... + 1263609.

It is an arithmetic number, because the mean of its divisors is an integer number (79589412).

Almost surely, 2^722621042 is an apocalyptic number.

722621042 is a deficient number, since it is larger than the sum of its proper divisors (550809550).

722621042 is a wasteful number, since it uses less digits than its factorization.

722621042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2526673.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 722621042 is about 26881.6115960334. The cubic root of 722621042 is about 897.3672202139.

Adding to 722621042 its reverse (240126227), we get a palindrome (962747269).

The spelling of 722621042 in words is "seven hundred twenty-two million, six hundred twenty-one thousand, forty-two".