1340527621 has 2 divisors, whose sum is σ = 1340527622. Its totient is φ = 1340527620.

The previous prime is 1340527619. The next prime is 1340527631. The reversal of 1340527621 is 1267250431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1182396996 + 158130625 = 34386^2 + 12575^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340527621 - 2¹ = 1340527619 is a prime.

Together with 1340527619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340527631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670263810 + 670263811.

It is an arithmetic number, because the mean of its divisors is an integer number (670263811).

Almost surely, 2^1340527621 is an apocalyptic number.

It is an amenable number.

1340527621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340527621 is an equidigital number, since it uses as much as digits as its factorization.

1340527621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 1340527621 is about 36613.2164798451. The cubic root of 1340527621 is about 1102.6184510479.

The spelling of 1340527621 in words is "one billion, three hundred forty million, five hundred twenty-seven thousand, six hundred twenty-one".