1340015405 has 16 divisors (see below), whose sum is σ = 1619189184. Its totient is φ = 1064586240.

The previous prime is 1340015381. The next prime is 1340015419. The reversal of 1340015405 is 5045100431.

It is not a de Polignac number, because 1340015405 - 2¹⁰ = 1340014381 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 874490 + ... + 876020.

It is an arithmetic number, because the mean of its divisors is an integer number (101199324).

Almost surely, 2^1340015405 is an apocalyptic number.

It is an amenable number.

1340015405 is a deficient number, since it is larger than the sum of its proper divisors (279173779).

1340015405 is a wasteful number, since it uses less digits than its factorization.

1340015405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2636.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1340015405 is about 36606.2208511067. The cubic root of 1340015405 is about 1102.4779962118.

Adding to 1340015405 its reverse (5045100431), we get a palindrome (6385115836).

The spelling of 1340015405 in words is "one billion, three hundred forty million, fifteen thousand, four hundred five".