1553159 has 2 divisors, whose sum is σ = 1553160. Its totient is φ = 1553158.

The previous prime is 1553147. The next prime is 1553173. The reversal of 1553159 is 9513551.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1553159 - 2¹⁶ = 1487623 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1553119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 776579 + 776580.

It is an arithmetic number, because the mean of its divisors is an integer number (776580).

2^1553159 is an apocalyptic number.

1553159 is a deficient number, since it is larger than the sum of its proper divisors (1).

1553159 is an equidigital number, since it uses as much as digits as its factorization.

1553159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3375, while the sum is 29.

The square root of 1553159 is about 1246.2579989713. The cubic root of 1553159 is about 115.8080207386.

The spelling of 1553159 in words is "one million, five hundred fifty-three thousand, one hundred fifty-nine".