1553291 has 2 divisors, whose sum is σ = 1553292. Its totient is φ = 1553290.

The previous prime is 1553287. The next prime is 1553309. The reversal of 1553291 is 1923551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1553291 - 2² = 1553287 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1553291.

It is not a weakly prime, because it can be changed into another prime (1553281) 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, 776645 + 776646.

It is an arithmetic number, because the mean of its divisors is an integer number (776646).

2^1553291 is an apocalyptic number.

1553291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1553291 is an equidigital number, since it uses as much as digits as its factorization.

1553291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1350, while the sum is 26.

The square root of 1553291 is about 1246.3109563829. The cubic root of 1553291 is about 115.8113014127.

The spelling of 1553291 in words is "one million, five hundred fifty-three thousand, two hundred ninety-one".