1540422 has 48 divisors (see below), whose sum is σ = 3734640. Its totient is φ = 455616.

The previous prime is 1540403. The next prime is 1540423. The reversal of 1540422 is 2240451.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1540395 and 1540404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6673 + ... + 6899.

It is an arithmetic number, because the mean of its divisors is an integer number (77805).

2^1540422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1540422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1867320).

1540422 is an abundant number, since it is smaller than the sum of its proper divisors (2194218).

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

1540422 is a wasteful number, since it uses less digits than its factorization.

1540422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277 (or 274 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 1540422 is about 1241.1373815980. The cubic root of 1540422 is about 115.4905822422.

Adding to 1540422 its reverse (2240451), we get a palindrome (3780873).

The spelling of 1540422 in words is "one million, five hundred forty thousand, four hundred twenty-two".