1540550 has 24 divisors (see below), whose sum is σ = 3127032. Its totient is φ = 560000.

The previous prime is 1540543. The next prime is 1540559. The reversal of 1540550 is 550451.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 851 + ... + 1950.

It is an arithmetic number, because the mean of its divisors is an integer number (130293).

2^1540550 is an apocalyptic number.

1540550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1540550 is an abundant number, since it is smaller than the sum of its proper divisors (1586482).

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

1540550 is a wasteful number, since it uses less digits than its factorization.

1540550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2824 (or 2819 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 1540550 is about 1241.1889461319. The cubic root of 1540550 is about 115.4937810161.

Subtracting from 1540550 its reverse (550451), we obtain a palindrome (990099).

The spelling of 1540550 in words is "one million, five hundred forty thousand, five hundred fifty".