1726640141 has 4 divisors (see below), whose sum is σ = 1727807484. Its totient is φ = 1725472800.

The previous prime is 1726640131. The next prime is 1726640159. The reversal of 1726640141 is 1410466271.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 770284516 + 956355625 = 27754^2 + 30925^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1726640141 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1726640098 and 1726640107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1726640101) 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, 581450 + ... + 584411.

It is an arithmetic number, because the mean of its divisors is an integer number (431951871).

Almost surely, 2^1726640141 is an apocalyptic number.

It is an amenable number.

1726640141 is a deficient number, since it is larger than the sum of its proper divisors (1167343).

1726640141 is a wasteful number, since it uses less digits than its factorization.

1726640141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167342.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 1726640141 is about 41552.8596007543. The cubic root of 1726640141 is about 1199.6851352148.

The spelling of 1726640141 in words is "one billion, seven hundred twenty-six million, six hundred forty thousand, one hundred forty-one".