1340542945 has 16 divisors (see below), whose sum is σ = 1851884928. Its totient is φ = 912516480.

The previous prime is 1340542937. The next prime is 1340542949. The reversal of 1340542945 is 5492450431.

It is a happy number.

It is not a de Polignac number, because 1340542945 - 2³ = 1340542937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340542949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134991 + ... + 144580.

It is an arithmetic number, because the mean of its divisors is an integer number (115742808).

Almost surely, 2^1340542945 is an apocalyptic number.

It is an amenable number.

1340542945 is a deficient number, since it is larger than the sum of its proper divisors (511341983).

1340542945 is a wasteful number, since it uses less digits than its factorization.

1340542945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279720.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 1340542945 is about 36613.4257479412. The cubic root of 1340542945 is about 1102.6226524932.

The spelling of 1340542945 in words is "one billion, three hundred forty million, five hundred forty-two thousand, nine hundred forty-five".