1550413 has 2 divisors, whose sum is σ = 1550414. Its totient is φ = 1550412.

The previous prime is 1550401. The next prime is 1550431. The reversal of 1550413 is 3140551.

Together with next prime (1550431) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1036324 + 514089 = 1018^2 + 717^2 .

It is an emirp because it is prime and its reverse (3140551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1550413 - 2¹³ = 1542221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1550443) 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, 775206 + 775207.

It is an arithmetic number, because the mean of its divisors is an integer number (775207).

2^1550413 is an apocalyptic number.

It is an amenable number.

1550413 is a deficient number, since it is larger than the sum of its proper divisors (1).

1550413 is an equidigital number, since it uses as much as digits as its factorization.

1550413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 1550413 is about 1245.1558135430. The cubic root of 1550413 is about 115.7397305799.

Adding to 1550413 its reverse (3140551), we get a palindrome (4690964).

The spelling of 1550413 in words is "one million, five hundred fifty thousand, four hundred thirteen".