1340905465 has 16 divisors (see below), whose sum is σ = 1676252160. Its totient is φ = 1028583360.

The previous prime is 1340905457. The next prime is 1340905469. The reversal of 1340905465 is 5645090431.

It is not a de Polignac number, because 1340905465 - 2³ = 1340905457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1340905469) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22789 + ... + 56578.

It is an arithmetic number, because the mean of its divisors is an integer number (104765760).

Almost surely, 2^1340905465 is an apocalyptic number.

It is an amenable number.

1340905465 is a deficient number, since it is larger than the sum of its proper divisors (335346695).

1340905465 is a wasteful number, since it uses less digits than its factorization.

1340905465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79512.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 1340905465 is about 36618.3760562917. The cubic root of 1340905465 is about 1102.7220367860.

Adding to 1340905465 its reverse (5645090431), we get a palindrome (6985995896).

The spelling of 1340905465 in words is "one billion, three hundred forty million, nine hundred five thousand, four hundred sixty-five".