1355540 has 12 divisors (see below), whose sum is σ = 2846676. Its totient is φ = 542208.

The previous prime is 1355533. The next prime is 1355573. The reversal of 1355540 is 455531.

It can be written as a sum of positive squares in 2 ways, for example, as 712336 + 643204 = 844^2 + 802^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33869 + ... + 33908.

It is an arithmetic number, because the mean of its divisors is an integer number (237223).

2^1355540 is an apocalyptic number.

1355540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1355540 is an abundant number, since it is smaller than the sum of its proper divisors (1491136).

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

1355540 is a wasteful number, since it uses less digits than its factorization.

1355540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67786 (or 67784 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 1355540 is about 1164.2765994385. The cubic root of 1355540 is about 110.6719203648.

Subtracting from 1355540 its reverse (455531), we obtain a palindrome (900009).

The spelling of 1355540 in words is "one million, three hundred fifty-five thousand, five hundred forty".