1550140 has 24 divisors (see below), whose sum is σ = 3281040. Its totient is φ = 615168.

The previous prime is 1550119. The next prime is 1550141. The reversal of 1550140 is 410551.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3364 + ... + 3796.

It is an arithmetic number, because the mean of its divisors is an integer number (136710).

2^1550140 is an apocalyptic number.

1550140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1550140 is an abundant number, since it is smaller than the sum of its proper divisors (1730900).

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

1550140 is a wasteful number, since it uses less digits than its factorization.

1550140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621 (or 619 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 1550140 is about 1245.0461838823. The cubic root of 1550140 is about 115.7329369490.

Adding to 1550140 its reverse (410551), we get a palindrome (1960691).

The spelling of 1550140 in words is "one million, five hundred fifty thousand, one hundred forty".