1542561203 has 4 divisors (see below), whose sum is σ = 1544262840. Its totient is φ = 1540859568.

The previous prime is 1542561193. The next prime is 1542561277. The reversal of 1542561203 is 3021652451.

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 1542561203 - 2⁸ = 1542560947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1542564203) 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, 849458 + ... + 851271.

It is an arithmetic number, because the mean of its divisors is an integer number (386065710).

Almost surely, 2^1542561203 is an apocalyptic number.

1542561203 is a deficient number, since it is larger than the sum of its proper divisors (1701637).

1542561203 is an equidigital number, since it uses as much as digits as its factorization.

1542561203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701636.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 1542561203 is about 39275.4529318250. The cubic root of 1542561203 is about 1155.4401857846.

The spelling of 1542561203 in words is "one billion, five hundred forty-two million, five hundred sixty-one thousand, two hundred three".