1541663 has 2 divisors, whose sum is σ = 1541664. Its totient is φ = 1541662.

The previous prime is 1541651. The next prime is 1541671. The reversal of 1541663 is 3661451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1541663 - 2¹⁰ = 1540639 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1541693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770831 + 770832.

It is an arithmetic number, because the mean of its divisors is an integer number (770832).

2^1541663 is an apocalyptic number.

1541663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1541663 is an equidigital number, since it uses as much as digits as its factorization.

1541663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 26.

The square root of 1541663 is about 1241.6372256017. The cubic root of 1541663 is about 115.5215878890.

The spelling of 1541663 in words is "one million, five hundred forty-one thousand, six hundred sixty-three".