1555041259 has 2 divisors, whose sum is σ = 1555041260. Its totient is φ = 1555041258.

The previous prime is 1555041209. The next prime is 1555041269. The reversal of 1555041259 is 9521405551.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1555041259 - 2¹⁷ = 1554910187 is a prime.

It is not a weakly prime, because it can be changed into another prime (1555041209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777520629 + 777520630.

It is an arithmetic number, because the mean of its divisors is an integer number (777520630).

Almost surely, 2^1555041259 is an apocalyptic number.

1555041259 is a deficient number, since it is larger than the sum of its proper divisors (1).

1555041259 is an equidigital number, since it uses as much as digits as its factorization.

1555041259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45000, while the sum is 37.

The square root of 1555041259 is about 39434.0114495089. The cubic root of 1555041259 is about 1158.5478407538.

The spelling of 1555041259 in words is "one billion, five hundred fifty-five million, forty-one thousand, two hundred fifty-nine".