1258643 has 2 divisors, whose sum is σ = 1258644. Its totient is φ = 1258642.

The previous prime is 1258639. The next prime is 1258657. The reversal of 1258643 is 3468521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1258643 - 2² = 1258639 is a prime.

It is equal to p₉₇₀₈₅ and since 1258643 and 97085 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (1258343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 629321 + 629322.

It is an arithmetic number, because the mean of its divisors is an integer number (629322).

2^1258643 is an apocalyptic number.

1258643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1258643 is an equidigital number, since it uses as much as digits as its factorization.

1258643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 29.

The square root of 1258643 is about 1121.8925973550. The cubic root of 1258643 is about 107.9694415144.

The spelling of 1258643 in words is "one million, two hundred fifty-eight thousand, six hundred forty-three".