1355440 has 20 divisors (see below), whose sum is σ = 3151584. Its totient is φ = 542144.

The previous prime is 1355429. The next prime is 1355443. The reversal of 1355440 is 445531.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (1355443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8392 + ... + 8551.

2^1355440 is an apocalyptic number.

1355440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1355440 is an abundant number, since it is smaller than the sum of its proper divisors (1796144).

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

1355440 is a wasteful number, since it uses less digits than its factorization.

1355440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16956 (or 16950 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 1355440 is about 1164.2336535249. The cubic root of 1355440 is about 110.6691988260.

Subtracting from 1355440 its reverse (445531), we obtain a palindrome (909909).

The spelling of 1355440 in words is "one million, three hundred fifty-five thousand, four hundred forty".