1542480209 has 4 divisors (see below), whose sum is σ = 1549275504. Its totient is φ = 1535684916.

The previous prime is 1542480197. The next prime is 1542480241. The reversal of 1542480209 is 9020842451.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1542480209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1542480409) 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, 3397307 + ... + 3397760.

It is an arithmetic number, because the mean of its divisors is an integer number (387318876).

Almost surely, 2^1542480209 is an apocalyptic number.

It is an amenable number.

1542480209 is a deficient number, since it is larger than the sum of its proper divisors (6795295).

1542480209 is an equidigital number, since it uses as much as digits as its factorization.

1542480209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6795294.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 1542480209 is about 39274.4218162407. The cubic root of 1542480209 is about 1155.4199628463.

The spelling of 1542480209 in words is "one billion, five hundred forty-two million, four hundred eighty thousand, two hundred nine".