1340001242 has 4 divisors (see below), whose sum is σ = 2010001866. Its totient is φ = 670000620.

The previous prime is 1340001241. The next prime is 1340001269. The reversal of 1340001242 is 2421000431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2421000431 = 41 ⋅59048791.

It can be written as a sum of positive squares in only one way, i.e., 1337438041 + 2563201 = 36571^2 + 1601^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1340001242.

It is not an unprimeable number, because it can be changed into a prime (1340001241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335000309 + ... + 335000312.

Almost surely, 2^1340001242 is an apocalyptic number.

1340001242 is a deficient number, since it is larger than the sum of its proper divisors (670000624).

1340001242 is an equidigital number, since it uses as much as digits as its factorization.

1340001242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670000623.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1340001242 is about 36606.0273998695. The cubic root of 1340001242 is about 1102.4741120647.

Adding to 1340001242 its reverse (2421000431), we get a palindrome (3761001673).

The spelling of 1340001242 in words is "one billion, three hundred forty million, one thousand, two hundred forty-two".