1340181729 has 12 divisors (see below), whose sum is σ = 1963084032. Its totient is φ = 880870200.

The previous prime is 1340181683. The next prime is 1340181767. The reversal of 1340181729 is 9271810431.

It is a happy number.

It is not a de Polignac number, because 1340181729 - 2¹² = 1340177633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1340181693 and 1340181702.

It is not an unprimeable number, because it can be changed into a prime (1340181769) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1048017 + ... + 1049294.

It is an arithmetic number, because the mean of its divisors is an integer number (163590336).

Almost surely, 2^1340181729 is an apocalyptic number.

It is an amenable number.

1340181729 is a deficient number, since it is larger than the sum of its proper divisors (622902303).

1340181729 is a wasteful number, since it uses less digits than its factorization.

1340181729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2097388 (or 2097385 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 1340181729 is about 36608.4925802743. The cubic root of 1340181729 is about 1102.5236078675.

The spelling of 1340181729 in words is "one billion, three hundred forty million, one hundred eighty-one thousand, seven hundred twenty-nine".