1542418509 has 4 divisors (see below), whose sum is σ = 2056558016. Its totient is φ = 1028279004.

The previous prime is 1542418463. The next prime is 1542418531. The reversal of 1542418509 is 9058142451.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9058142451 = 3 ⋅3019380817.

It is not a de Polignac number, because 1542418509 - 2⁸ = 1542418253 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 (1542418909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 257069749 + ... + 257069754.

It is an arithmetic number, because the mean of its divisors is an integer number (514139504).

Almost surely, 2^1542418509 is an apocalyptic number.

It is an amenable number.

1542418509 is a deficient number, since it is larger than the sum of its proper divisors (514139507).

1542418509 is an equidigital number, since it uses as much as digits as its factorization.

1542418509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514139506.

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 1542418509 is about 39273.6363098708. The cubic root of 1542418509 is about 1155.4045568437.

It can be divided in two parts, 15424 and 18509, that added together give a palindrome (33933).

The spelling of 1542418509 in words is "one billion, five hundred forty-two million, four hundred eighteen thousand, five hundred nine".