1720141562421 has 48 divisors (see below), whose sum is σ = 2539601026560. Its totient is φ = 1121660036640.

The previous prime is 1720141562411. The next prime is 1720141562437. The reversal of 1720141562421 is 1242651410271.

1720141562421 is a `hidden beast` number, since 1 + 7 + 2 + 0 + 1 + 4 + 1 + 5 + 624 + 21 = 666.

It is not a de Polignac number, because 1720141562421 - 2¹⁵ = 1720141529653 is a prime.

It is a super-3 number, since 3×1720141562421³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720141562411) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 74572936 + ... + 74595998.

It is an arithmetic number, because the mean of its divisors is an integer number (52908354720).

Almost surely, 2^{1720141562421} is an apocalyptic number.

It is an amenable number.

1720141562421 is a deficient number, since it is larger than the sum of its proper divisors (819459464139).

1720141562421 is a wasteful number, since it uses less digits than its factorization.

1720141562421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24006 (or 24003 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

Adding to 1720141562421 its reverse (1242651410271), we get a palindrome (2962792972692).

The spelling of 1720141562421 in words is "one trillion, seven hundred twenty billion, one hundred forty-one million, five hundred sixty-two thousand, four hundred twenty-one".