1555423 has 2 divisors, whose sum is σ = 1555424. Its totient is φ = 1555422.

The previous prime is 1555409. The next prime is 1555429. The reversal of 1555423 is 3245551.

It is a strong prime.

It is an emirp because it is prime and its reverse (3245551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1555423 - 2¹⁷ = 1424351 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1555429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777711 + 777712.

It is an arithmetic number, because the mean of its divisors is an integer number (777712).

2^1555423 is an apocalyptic number.

1555423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1555423 is an equidigital number, since it uses as much as digits as its factorization.

1555423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3000, while the sum is 25.

The square root of 1555423 is about 1247.1659873489. The cubic root of 1555423 is about 115.8642635458.

The spelling of 1555423 in words is "one million, five hundred fifty-five thousand, four hundred twenty-three".