1356240 has 40 divisors (see below), whose sum is σ = 4205088. Its totient is φ = 361600.

The previous prime is 1356227. The next prime is 1356247. The reversal of 1356240 is 426531.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2586 + ... + 3065.

2^1356240 is an apocalyptic number.

1356240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1356240 is an abundant number, since it is smaller than the sum of its proper divisors (2848848).

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

1356240 is a wasteful number, since it uses less digits than its factorization.

1356240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5667 (or 5661 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1356240 is about 1164.5771764894. The cubic root of 1356240 is about 110.6909673898.

It can be divided in two parts, 1356 and 240, that added together give a triangular number (1596 = T₅₆).

The spelling of 1356240 in words is "one million, three hundred fifty-six thousand, two hundred forty".