1540106 has 4 divisors (see below), whose sum is σ = 2310162. Its totient is φ = 770052.

The previous prime is 1540087. The next prime is 1540109. The reversal of 1540106 is 6010451.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1540081 + 25 = 1241^2 + 5^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1540109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 385025 + ... + 385028.

2^1540106 is an apocalyptic number.

1540106 is a deficient number, since it is larger than the sum of its proper divisors (770056).

1540106 is an equidigital number, since it uses as much as digits as its factorization.

1540106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770055.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1540106 is about 1241.0100724813. The cubic root of 1540106 is about 115.4826845103.

Adding to 1540106 its reverse (6010451), we get a palindrome (7550557).

The spelling of 1540106 in words is "one million, five hundred forty thousand, one hundred six".