1542020503 has 4 divisors (see below), whose sum is σ = 1544536648. Its totient is φ = 1539504360.

The previous prime is 1542020483. The next prime is 1542020521. The reversal of 1542020503 is 3050202451.

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

It is a cyclic number.

It is not a de Polignac number, because 1542020503 - 2⁵ = 1542020471 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 (1542020573) 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, 1257153 + ... + 1258378.

It is an arithmetic number, because the mean of its divisors is an integer number (386134162).

Almost surely, 2^1542020503 is an apocalyptic number.

1542020503 is a deficient number, since it is larger than the sum of its proper divisors (2516145).

1542020503 is an equidigital number, since it uses as much as digits as its factorization.

1542020503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2516144.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 1542020503 is about 39268.5688942187. The cubic root of 1542020503 is about 1155.3051680153.

Adding to 1542020503 its reverse (3050202451), we get a palindrome (4592222954).

The spelling of 1542020503 in words is "one billion, five hundred forty-two million, twenty thousand, five hundred three".