1340049921 has 32 divisors (see below), whose sum is σ = 2068070400. Its totient is φ = 756004800.

The previous prime is 1340049883. The next prime is 1340050001. The reversal of 1340049921 is 1299400431.

It is not a de Polignac number, because 1340049921 - 2⁹ = 1340049409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1340049521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1015300 + ... + 1016618.

It is an arithmetic number, because the mean of its divisors is an integer number (64627200).

Almost surely, 2^1340049921 is an apocalyptic number.

It is an amenable number.

1340049921 is a deficient number, since it is larger than the sum of its proper divisors (728020479).

1340049921 is a wasteful number, since it uses less digits than its factorization.

1340049921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1909.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 1340049921 is about 36606.6922979938. The cubic root of 1340049921 is about 1102.4874619745.

The spelling of 1340049921 in words is "one billion, three hundred forty million, forty-nine thousand, nine hundred twenty-one".