1555349 has 2 divisors, whose sum is σ = 1555350. Its totient is φ = 1555348.

The previous prime is 1555343. The next prime is 1555409. The reversal of 1555349 is 9435551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1380625 + 174724 = 1175^2 + 418^2 .

It is an emirp because it is prime and its reverse (9435551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1555349 - 2²⁰ = 506773 is a prime.

It is a super-2 number, since 2×1555349² = 4838221023602, 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 (1555343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777674 + 777675.

It is an arithmetic number, because the mean of its divisors is an integer number (777675).

2^1555349 is an apocalyptic number.

It is an amenable number.

1555349 is a deficient number, since it is larger than the sum of its proper divisors (1).

1555349 is an equidigital number, since it uses as much as digits as its factorization.

1555349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13500, while the sum is 32.

The square root of 1555349 is about 1247.1363197341. The cubic root of 1555349 is about 115.8624260839.

The spelling of 1555349 in words is "one million, five hundred fifty-five thousand, three hundred forty-nine".