1742612321 has 4 divisors (see below), whose sum is σ = 1758599700. Its totient is φ = 1726624944.

The previous prime is 1742612317. The next prime is 1742612351. The reversal of 1742612321 is 1232162471.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1232162471 = 71 ⋅17354401.

It can be written as a sum of positive squares in 2 ways, for example, as 555120721 + 1187491600 = 23561^2 + 34460^2 .

It is a cyclic number.

It is not a de Polignac number, because 1742612321 - 2² = 1742612317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1742612351) 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, 7993526 + ... + 7993743.

It is an arithmetic number, because the mean of its divisors is an integer number (439649925).

Almost surely, 2^1742612321 is an apocalyptic number.

It is an amenable number.

1742612321 is a deficient number, since it is larger than the sum of its proper divisors (15987379).

1742612321 is a wasteful number, since it uses less digits than its factorization.

1742612321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15987378.

The product of its digits is 4032, while the sum is 29.

The square root of 1742612321 is about 41744.6082865800. The cubic root of 1742612321 is about 1203.3729919344.

Adding to 1742612321 its reverse (1232162471), we get a palindrome (2974774792).

The spelling of 1742612321 in words is "one billion, seven hundred forty-two million, six hundred twelve thousand, three hundred twenty-one".