1536881 has 2 divisors, whose sum is σ = 1536882. Its totient is φ = 1536880.

The previous prime is 1536839. The next prime is 1536889. The reversal of 1536881 is 1886351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1343281 + 193600 = 1159^2 + 440^2 .

It is an emirp because it is prime and its reverse (1886351) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1536881 - 2¹⁰ = 1535857 is a prime.

It is a super-2 number, since 2×1536881² = 4724006416322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1536889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 768440 + 768441.

It is an arithmetic number, because the mean of its divisors is an integer number (768441).

2^1536881 is an apocalyptic number.

It is an amenable number.

1536881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1536881 is an equidigital number, since it uses as much as digits as its factorization.

1536881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 32.

The square root of 1536881 is about 1239.7100467448. The cubic root of 1536881 is about 115.4020208159.

The spelling of 1536881 in words is "one million, five hundred thirty-six thousand, eight hundred eighty-one".