1542109 has 4 divisors (see below), whose sum is σ = 1578016. Its totient is φ = 1506204.

The previous prime is 1542091. The next prime is 1542119. The reversal of 1542109 is 9012451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1542109 - 2⁵ = 1542077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1542109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1542119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17889 + ... + 17974.

It is an arithmetic number, because the mean of its divisors is an integer number (394504).

2^1542109 is an apocalyptic number.

It is an amenable number.

1542109 is a deficient number, since it is larger than the sum of its proper divisors (35907).

1542109 is an equidigital number, since it uses as much as digits as its factorization.

1542109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35906.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 1542109 is about 1241.8168141880. The cubic root of 1542109 is about 115.5327268691.

It can be divided in two parts, 15 and 42109, that added together give a palindrome (42124).

The spelling of 1542109 in words is "one million, five hundred forty-two thousand, one hundred nine".