1251583 has 2 divisors, whose sum is σ = 1251584. Its totient is φ = 1251582.

The previous prime is 1251581. The next prime is 1251641. The reversal of 1251583 is 3851521.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1251583 - 2¹ = 1251581 is a prime.

Together with 1251581, 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 (1251581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625791 + 625792.

It is an arithmetic number, because the mean of its divisors is an integer number (625792).

2^1251583 is an apocalyptic number.

1251583 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251583 is an equidigital number, since it uses as much as digits as its factorization.

1251583 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1200, while the sum is 25.

The square root of 1251583 is about 1118.7417038799. The cubic root of 1251583 is about 107.7671882543.

The spelling of 1251583 in words is "one million, two hundred fifty-one thousand, five hundred eighty-three".