1740643121 has 6 divisors (see below), whose sum is σ = 2024829810. Its totient is φ = 1491979776.

The previous prime is 1740643111. The next prime is 1740643147. The reversal of 1740643121 is 1213460471.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1467732721 + 272910400 = 38311^2 + 16520^2 .

It is not a de Polignac number, because 1740643121 - 2⁶ = 1740643057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1740643111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17761616 + ... + 17761713.

It is an arithmetic number, because the mean of its divisors is an integer number (337471635).

Almost surely, 2^1740643121 is an apocalyptic number.

It is an amenable number.

1740643121 is a deficient number, since it is larger than the sum of its proper divisors (284186689).

1740643121 is an equidigital number, since it uses as much as digits as its factorization.

1740643121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35523343 (or 35523336 counting only the distinct ones).

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

The square root of 1740643121 is about 41721.0153399938. The cubic root of 1740643121 is about 1202.9195395266.

The spelling of 1740643121 in words is "one billion, seven hundred forty million, six hundred forty-three thousand, one hundred twenty-one".