1556963 has 2 divisors, whose sum is σ = 1556964. Its totient is φ = 1556962.

The previous prime is 1556927. The next prime is 1556977. The reversal of 1556963 is 3696551.

It is a strong prime.

It is an emirp because it is prime and its reverse (3696551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1556963 - 2¹² = 1552867 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1556263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 778481 + 778482.

It is an arithmetic number, because the mean of its divisors is an integer number (778482).

2^1556963 is an apocalyptic number.

1556963 is a deficient number, since it is larger than the sum of its proper divisors (1).

1556963 is an equidigital number, since it uses as much as digits as its factorization.

1556963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24300, while the sum is 35.

The square root of 1556963 is about 1247.7832343801. The cubic root of 1556963 is about 115.9024893984.

The spelling of 1556963 in words is "one million, five hundred fifty-six thousand, nine hundred sixty-three".