1555560 has 96 divisors (see below), whose sum is σ = 5265000. Its totient is φ = 397824.

The previous prime is 1555553. The next prime is 1555571. The reversal of 1555560 is 655551.

It can be written as a sum of positive squares in 4 ways, for example, as 956484 + 599076 = 978^2 + 774^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10366 + ... + 10514.

2^1555560 is an apocalyptic number.

1555560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1555560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2632500).

1555560 is an abundant number, since it is smaller than the sum of its proper divisors (3709440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1555560 is a wasteful number, since it uses less digits than its factorization.

1555560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 27.

The square root of 1555560 is about 1247.2209106650. The cubic root of 1555560 is about 115.8676651795.

Subtracting from 1555560 its reverse (655551), we obtain a palindrome (900009).

The spelling of 1555560 in words is "one million, five hundred fifty-five thousand, five hundred sixty".