1345889 has 2 divisors, whose sum is σ = 1345890. Its totient is φ = 1345888.

The previous prime is 1345879. The next prime is 1345913. The reversal of 1345889 is 9885431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1345600 + 289 = 1160^2 + 17^2 .

It is a cyclic number.

It is not a de Polignac number, because 1345889 - 2⁸ = 1345633 is a prime.

It is a super-2 number, since 2×1345889² = 3622834400642, which contains 22 as substring.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (1345859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672944 + 672945.

It is an arithmetic number, because the mean of its divisors is an integer number (672945).

2^1345889 is an apocalyptic number.

It is an amenable number.

1345889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345889 is an equidigital number, since it uses as much as digits as its factorization.

1345889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 38.

The square root of 1345889 is about 1160.1245622777. The cubic root of 1345889 is about 110.4086453095.

The spelling of 1345889 in words is "one million, three hundred forty-five thousand, eight hundred eighty-nine".