1721073439402 has 16 divisors (see below), whose sum is σ = 2698220175552. Its totient is φ = 821787994720.

The previous prime is 1721073439387. The next prime is 1721073439403. The reversal of 1721073439402 is 2049343701271.

It is a happy number.

It is a super-2 number, since 2×1721073439402² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1721073439403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30291424 + ... + 30348187.

It is an arithmetic number, because the mean of its divisors is an integer number (168638760972).

Almost surely, 2^{1721073439402} is an apocalyptic number.

1721073439402 is a deficient number, since it is larger than the sum of its proper divisors (977146736150).

1721073439402 is a wasteful number, since it uses less digits than its factorization.

1721073439402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60640253.

The product of its (nonzero) digits is 254016, while the sum is 43.

The spelling of 1721073439402 in words is "one trillion, seven hundred twenty-one billion, seventy-three million, four hundred thirty-nine thousand, four hundred two".