1553081 has 2 divisors, whose sum is σ = 1553082. Its totient is φ = 1553080.

The previous prime is 1553063. The next prime is 1553089. The reversal of 1553081 is 1803551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 839056 + 714025 = 916^2 + 845^2 .

It is an emirp because it is prime and its reverse (1803551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1553081 - 2⁶ = 1553017 is a prime.

It is a super-2 number, since 2×1553081² = 4824121185122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1553089) 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, 776540 + 776541.

It is an arithmetic number, because the mean of its divisors is an integer number (776541).

2^1553081 is an apocalyptic number.

It is an amenable number.

1553081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1553081 is an equidigital number, since it uses as much as digits as its factorization.

1553081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1553081 is about 1246.2267048976. The cubic root of 1553081 is about 115.8060820710.

The spelling of 1553081 in words is "one million, five hundred fifty-three thousand, eighty-one".