1559447 has 2 divisors, whose sum is σ = 1559448. Its totient is φ = 1559446.

The previous prime is 1559443. The next prime is 1559449. The reversal of 1559447 is 7449551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1559447 - 2² = 1559443 is a prime.

Together with 1559449, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1559443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 779723 + 779724.

It is an arithmetic number, because the mean of its divisors is an integer number (779724).

2^1559447 is an apocalyptic number.

1559447 is the 668-th centered heptagonal number.

1559447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1559447 is an equidigital number, since it uses as much as digits as its factorization.

1559447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 35.

The square root of 1559447 is about 1248.7782028847. The cubic root of 1559447 is about 115.9640941189.

The spelling of 1559447 in words is "one million, five hundred fifty-nine thousand, four hundred forty-seven".