1555123 has 2 divisors, whose sum is σ = 1555124. Its totient is φ = 1555122.

The previous prime is 1555117. The next prime is 1555129. The reversal of 1555123 is 3215551.

It is a balanced prime because it is at equal distance from previous prime (1555117) and next prime (1555129).

It is a cyclic number.

It is not a de Polignac number, because 1555123 - 2⁵ = 1555091 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1555094 and 1555103.

It is not a weakly prime, because it can be changed into another prime (1555129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777561 + 777562.

It is an arithmetic number, because the mean of its divisors is an integer number (777562).

2^1555123 is an apocalyptic number.

1555123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1555123 is an equidigital number, since it uses as much as digits as its factorization.

1555123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 750, while the sum is 22.

The square root of 1555123 is about 1247.0457088656. The cubic root of 1555123 is about 115.8568140151.

The spelling of 1555123 in words is "one million, five hundred fifty-five thousand, one hundred twenty-three".