1555013 has 2 divisors, whose sum is σ = 1555014. Its totient is φ = 1555012.

The previous prime is 1554989. The next prime is 1555027. The reversal of 1555013 is 3105551.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1555009 + 4 = 1247^2 + 2^2 .

It is an emirp because it is prime and its reverse (3105551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1555013 - 2⁸ = 1554757 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1555033) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777506 + 777507.

It is an arithmetic number, because the mean of its divisors is an integer number (777507).

2^1555013 is an apocalyptic number.

It is an amenable number.

1555013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1555013 is an equidigital number, since it uses as much as digits as its factorization.

1555013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 375, while the sum is 20.

The square root of 1555013 is about 1247.0016038482. The cubic root of 1555013 is about 115.8540822805.

The spelling of 1555013 in words is "one million, five hundred fifty-five thousand, thirteen".