1550240 has 24 divisors (see below), whose sum is σ = 3662820. Its totient is φ = 620032.

The previous prime is 1550233. The next prime is 1550243. The reversal of 1550240 is 420551.

It can be written as a sum of positive squares in 2 ways, for example, as 1547536 + 2704 = 1244^2 + 52^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550243) 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 3 ways as a sum of consecutive naturals, for example, 4685 + ... + 5004.

2^1550240 is an apocalyptic number.

1550240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1550240 is an abundant number, since it is smaller than the sum of its proper divisors (2112580).

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

1550240 is an equidigital number, since it uses as much as digits as its factorization.

1550240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9704 (or 9696 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 1550240 is about 1245.0863423875. The cubic root of 1550240 is about 115.7354255511.

Adding to 1550240 its reverse (420551), we get a palindrome (1970791).

The spelling of 1550240 in words is "one million, five hundred fifty thousand, two hundred forty".