1340219651 has 4 divisors (see below), whose sum is σ = 1343205000. Its totient is φ = 1337234304.

The previous prime is 1340219641. The next prime is 1340219653. The reversal of 1340219651 is 1569120431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1569120431 = 359 ⋅4370809.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1340219651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340219653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1492001 + ... + 1492898.

It is an arithmetic number, because the mean of its divisors is an integer number (335801250).

Almost surely, 2^1340219651 is an apocalyptic number.

1340219651 is a deficient number, since it is larger than the sum of its proper divisors (2985349).

1340219651 is an equidigital number, since it uses as much as digits as its factorization.

1340219651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2985348.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 1340219651 is about 36609.0105165381. The cubic root of 1340219651 is about 1102.5340068318.

The spelling of 1340219651 in words is "one billion, three hundred forty million, two hundred nineteen thousand, six hundred fifty-one".