1740840145 has 16 divisors (see below), whose sum is σ = 2299093632. Its totient is φ = 1254856960.

The previous prime is 1740840139. The next prime is 1740840149. The reversal of 1740840145 is 5410480471.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1740840145 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1740840145.

It is not an unprimeable number, because it can be changed into a prime (1740840149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133837 + ... + 146266.

It is an arithmetic number, because the mean of its divisors is an integer number (143693352).

Almost surely, 2^1740840145 is an apocalyptic number.

It is an amenable number.

1740840145 is a deficient number, since it is larger than the sum of its proper divisors (558253487).

1740840145 is a wasteful number, since it uses less digits than its factorization.

1740840145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280232.

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 1740840145 is about 41723.3764812964. The cubic root of 1740840145 is about 1202.9649241079.

The spelling of 1740840145 in words is "one billion, seven hundred forty million, eight hundred forty thousand, one hundred forty-five".