1340520267 has 4 divisors (see below), whose sum is σ = 1787360360. Its totient is φ = 893680176.

The previous prime is 1340520263. The next prime is 1340520271. The reversal of 1340520267 is 7620250431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7620250431 = 3 ⋅2540083477.

It is an interprime number because it is at equal distance from previous prime (1340520263) and next prime (1340520271).

It is not a de Polignac number, because 1340520267 - 2² = 1340520263 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340520263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223420042 + ... + 223420047.

It is an arithmetic number, because the mean of its divisors is an integer number (446840090).

Almost surely, 2^1340520267 is an apocalyptic number.

1340520267 is a deficient number, since it is larger than the sum of its proper divisors (446840093).

1340520267 is an equidigital number, since it uses as much as digits as its factorization.

1340520267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446840092.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 1340520267 is about 36613.1160514917. The cubic root of 1340520267 is about 1102.6164347594.

Adding to 1340520267 its reverse (7620250431), we get a palindrome (8960770698).

The spelling of 1340520267 in words is "one billion, three hundred forty million, five hundred twenty thousand, two hundred sixty-seven".