1340432042 has 12 divisors (see below), whose sum is σ = 2101870050. Its totient is φ = 641075688.

The previous prime is 1340432021. The next prime is 1340432053. The reversal of 1340432042 is 2402340431.

It can be written as a sum of positive squares in only one way, i.e., 1227030841 + 113401201 = 35029^2 + 10649^2 .

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 1340431999 and 1340432017.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 632417 + ... + 634532.

Almost surely, 2^1340432042 is an apocalyptic number.

1340432042 is a deficient number, since it is larger than the sum of its proper divisors (761438008).

1340432042 is a wasteful number, since it uses less digits than its factorization.

1340432042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266997 (or 1266974 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 1340432042 is about 36611.9112038692. The cubic root of 1340432042 is about 1102.5922450297.

Adding to 1340432042 its reverse (2402340431), we get a palindrome (3742772473).

The spelling of 1340432042 in words is "one billion, three hundred forty million, four hundred thirty-two thousand, forty-two".