1361559 has 8 divisors (see below), whose sum is σ = 1911040. Its totient is φ = 859896.

The previous prime is 1361533. The next prime is 1361573. The reversal of 1361559 is 9551631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1361559 - 2⁷ = 1361431 is a prime.

It is a Duffinian number.

1361559 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11887 + ... + 12000.

It is an arithmetic number, because the mean of its divisors is an integer number (238880).

2^1361559 is an apocalyptic number.

1361559 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1361559 is a deficient number, since it is larger than the sum of its proper divisors (549481).

1361559 is a wasteful number, since it uses less digits than its factorization.

1361559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23909.

The product of its digits is 4050, while the sum is 30.

The square root of 1361559 is about 1166.8586032592. The cubic root of 1361559 is about 110.8354839062.

It can be divided in two parts, 136155 and 9, that multiplied together give a triangular number (1225395 = T₁₅₆₅).

The spelling of 1361559 in words is "one million, three hundred sixty-one thousand, five hundred fifty-nine".