1238551 has 2 divisors, whose sum is σ = 1238552. Its totient is φ = 1238550.

The previous prime is 1238537. The next prime is 1238597. The reversal of 1238551 is 1558321.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1558321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1238551 - 2⁷ = 1238423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1238521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619275 + 619276.

It is an arithmetic number, because the mean of its divisors is an integer number (619276).

2^1238551 is an apocalyptic number.

1238551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1238551 is an equidigital number, since it uses as much as digits as its factorization.

1238551 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 1238551 is about 1112.9020621780. The cubic root of 1238551 is about 107.3918436264.

The spelling of 1238551 in words is "one million, two hundred thirty-eight thousand, five hundred fifty-one".