1555541 has 4 divisors (see below), whose sum is σ = 1675212. Its totient is φ = 1435872.

The previous prime is 1555529. The next prime is 1555553. The reversal of 1555541 is 1455551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1455551 = 233 ⋅6247.

It is an interprime number because it is at equal distance from previous prime (1555529) and next prime (1555553).

It can be written as a sum of positive squares in 2 ways, for example, as 280900 + 1274641 = 530^2 + 1129^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1555541 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1555541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555571) 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 in 3 ways as a sum of consecutive naturals, for example, 59816 + ... + 59841.

It is an arithmetic number, because the mean of its divisors is an integer number (418803).

2^1555541 is an apocalyptic number.

It is an amenable number.

1555541 is a deficient number, since it is larger than the sum of its proper divisors (119671).

1555541 is a wasteful number, since it uses less digits than its factorization.

1555541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119670.

The product of its digits is 2500, while the sum is 26.

The square root of 1555541 is about 1247.2132937072. The cubic root of 1555541 is about 115.8671934320.

The spelling of 1555541 in words is "one million, five hundred fifty-five thousand, five hundred forty-one".