1542109197 has 4 divisors (see below), whose sum is σ = 2056145600. Its totient is φ = 1028072796.

The previous prime is 1542109183. The next prime is 1542109213. The reversal of 1542109197 is 7919012451.

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 1542109197 - 2⁴ = 1542109181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1542109397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 257018197 + ... + 257018202.

It is an arithmetic number, because the mean of its divisors is an integer number (514036400).

Almost surely, 2^1542109197 is an apocalyptic number.

It is an amenable number.

1542109197 is a deficient number, since it is larger than the sum of its proper divisors (514036403).

1542109197 is an equidigital number, since it uses as much as digits as its factorization.

1542109197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514036402.

The product of its (nonzero) digits is 22680, while the sum is 39.

The square root of 1542109197 is about 39269.6982035768. The cubic root of 1542109197 is about 1155.3273178877.

The spelling of 1542109197 in words is "one billion, five hundred forty-two million, one hundred nine thousand, one hundred ninety-seven".