1345651 has 2 divisors, whose sum is σ = 1345652. Its totient is φ = 1345650.

The previous prime is 1345649. The next prime is 1345667. The reversal of 1345651 is 1565431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1345651 - 2¹ = 1345649 is a prime.

It is a super-2 number, since 2×1345651² = 3621553227602, which contains 22 as substring.

Together with 1345649, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1345621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672825 + 672826.

It is an arithmetic number, because the mean of its divisors is an integer number (672826).

2^1345651 is an apocalyptic number.

1345651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345651 is an equidigital number, since it uses as much as digits as its factorization.

1345651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 25.

The square root of 1345651 is about 1160.0219825503. The cubic root of 1345651 is about 110.4021368959.

The spelling of 1345651 in words is "one million, three hundred forty-five thousand, six hundred fifty-one".