1542603 has 4 divisors (see below), whose sum is σ = 2056808. Its totient is φ = 1028400.

The previous prime is 1542599. The next prime is 1542661. The reversal of 1542603 is 3062451.

It is a happy number.

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

It is not a de Polignac number, because 1542603 - 2² = 1542599 is a prime.

It is a D-number.

It is a Duffinian number.

1542603 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1542603.

It is not an unprimeable number, because it can be changed into a prime (1542503) 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, 257098 + ... + 257103.

It is an arithmetic number, because the mean of its divisors is an integer number (514202).

2^1542603 is an apocalyptic number.

1542603 is a deficient number, since it is larger than the sum of its proper divisors (514205).

1542603 is an equidigital number, since it uses as much as digits as its factorization.

1542603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514204.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1542603 is about 1242.0157003839. The cubic root of 1542603 is about 115.5450621567.

It can be divided in two parts, 1542 and 603, that added together give a triangular number (2145 = T₆₅).

The spelling of 1542603 in words is "one million, five hundred forty-two thousand, six hundred three".