1254689 has 2 divisors, whose sum is σ = 1254690. Its totient is φ = 1254688.

The previous prime is 1254683. The next prime is 1254731. The reversal of 1254689 is 9864521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1254400 + 289 = 1120^2 + 17^2 .

It is a cyclic number.

It is not a de Polignac number, because 1254689 - 2⁸ = 1254433 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p₉₆₇₉₄ and since 1254689 and 96794 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1254683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627344 + 627345.

It is an arithmetic number, because the mean of its divisors is an integer number (627345).

2^1254689 is an apocalyptic number.

It is an amenable number.

1254689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1254689 is an equidigital number, since it uses as much as digits as its factorization.

1254689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 35.

The square root of 1254689 is about 1120.1290104269. The cubic root of 1254689 is about 107.8562616856.

The spelling of 1254689 in words is "one million, two hundred fifty-four thousand, six hundred eighty-nine".